A problem about calling Labview vi in VB
Hi all:
I meeting a problem about data transfer and parallel operation between VB and Labview.
Actually, I want develop a VB program, in which, the Labview VI can be called and corresponding parameters can be transferred to Labview. and then, I also can operate my system by VB program at same time. something like parallel operation (VB and Labview program).
But the question is :
1. If I use "Call" method of ActiveX in VB, and the LabVIEW subvi is not stopped (for example, a loop structure), I can not do parallel operation on VB program. The error message is "other application is busy" which is attached below. The sample codes is also attached.
2. I tried to use other methods like "OpenFrontPanel" and "Run", but I am not sure how to transfer the parameter??
3. Then I tried to use "SetControlValue" to set the parameters, but there is a error " := expected", which is very strange, because the statement I wrote is followed with the help documents [ eg: VI.SetControlValue ("string", value)], why it is still need a "=" ??
Does anybody know something about it? Thanks a lot
Message Edited by hanwei on 11-07-2008 03:18 PM
Attachments:
vb_labview_error_message_1.JPG 14 KB
VB_to_LV.zip 10 KB
I sure hope OP has solved it by now.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV
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BDC Problem about call T-CODE BUG2
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I have a requirement about BDC process t-code BUG2.
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Problem about Calling SQLplus Web Service on Aspen Watch Server
Hi all,
We're using MII 11.5 and trying to call a web service from a Aspen Watch server through the web service block in transaction. The web service enclosed a function call ExecuteSQL which will accept a sql query function and return a set of Data. Now, using the same web service on two different servers, we got a success(server A) and a failure(Server B). On the failed call, right in the first page of enter a URL, it will return a "SOAP Service could not be loaded: The element type 'META' must be terminated by the machine end-tag '</META>'" error.
According to the admin of the web server, the web service on both servers can be called correctly when he created two simple ASP pages. After serious testing, he thought that the only reason should be MII may not be compatible with .Net 2.0 binding web service. The following is some comparison we made to the two servers.
Server A / Server B / Error, if applicable
.Net Framework installed on MII server: 1.1, 2.0 / 1.1, 2.0
.Net Binding: 1.1 / 2.0
IIS version on MII server: 6 / 6
From MII server broser to Server A web service: Yes / Yes
From MII server browser to Server B web service: No / No / Return on web "The test form is only available for requests from the local machine"
From localhost browser to Server A web service: n/a // Yes
From localhost browser to Server B web service: Yes // n/a
From PC browser to Server B web service: No / Yes / Return on web "The test form is only available for requests from the local machine"
Credentials required to run web service: No / Yes /
The following are the SOAP generated:
Server A
<?xml version="1.0" encoding="utf-8" ?>
- <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://www.aspentech.com/SQLplus.WebService/" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" targetNamespace="http://www.aspentech.com/SQLplus.WebService/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
- <wsdl:types>
- <s:schema elementFormDefault="qualified" targetNamespace="http://www.aspentech.com/SQLplus.WebService/">
- <s:element name="ExecuteSQL">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="command" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
- <s:element name="ExecuteSQLResponse">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="ExecuteSQLResult" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
<s:element name="string" nillable="true" type="s:string" />
</s:schema>
</wsdl:types>
- <wsdl:message name="ExecuteSQLSoapIn">
<wsdl:part name="parameters" element="tns:ExecuteSQL" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLSoapOut">
<wsdl:part name="parameters" element="tns:ExecuteSQLResponse" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpGetIn">
<wsdl:part name="command" type="s:string" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpGetOut">
<wsdl:part name="Body" element="tns:string" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpPostIn">
<wsdl:part name="command" type="s:string" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpPostOut">
<wsdl:part name="Body" element="tns:string" />
</wsdl:message>
- <wsdl:portType name="SQLplusWebServiceSoap">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLSoapIn" />
<wsdl:output message="tns:ExecuteSQLSoapOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:portType name="SQLplusWebServiceHttpGet">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLHttpGetIn" />
<wsdl:output message="tns:ExecuteSQLHttpGetOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:portType name="SQLplusWebServiceHttpPost">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLHttpPostIn" />
<wsdl:output message="tns:ExecuteSQLHttpPostOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:binding name="SQLplusWebServiceSoap" type="tns:SQLplusWebServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceSoap12" type="tns:SQLplusWebServiceSoap">
<soap12:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap12:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap12:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap12:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceHttpGet" type="tns:SQLplusWebServiceHttpGet">
<http:binding verb="GET" />
- <wsdl:operation name="ExecuteSQL">
<http:operation location="/ExecuteSQL" />
- <wsdl:input>
<http:urlEncoded />
</wsdl:input>
- <wsdl:output>
<mime:mimeXml part="Body" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceHttpPost" type="tns:SQLplusWebServiceHttpPost">
<http:binding verb="POST" />
- <wsdl:operation name="ExecuteSQL">
<http:operation location="/ExecuteSQL" />
- <wsdl:input>
<mime:content type="application/x-www-form-urlencoded" />
</wsdl:input>
- <wsdl:output>
<mime:mimeXml part="Body" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:service name="SQLplusWebService">
- <wsdl:port name="SQLplusWebServiceSoap" binding="tns:SQLplusWebServiceSoap">
<soap:address location="http://clkaspenwatch:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceSoap12" binding="tns:SQLplusWebServiceSoap12">
<soap12:address location="http://clkaspenwatch:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceHttpGet" binding="tns:SQLplusWebServiceHttpGet">
<http:address location="http://servera:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceHttpPost" binding="tns:SQLplusWebServiceHttpPost">
<http:address location="http://servera:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
Server B
<?xml version="1.0" encoding="utf-8" ?>
- <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://www.aspentech.com/SQLplus.WebService/" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" targetNamespace="http://www.aspentech.com/SQLplus.WebService/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
- <wsdl:types>
- <s:schema elementFormDefault="qualified" targetNamespace="http://www.aspentech.com/SQLplus.WebService/">
- <s:element name="ExecuteSQL">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="command" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
- <s:element name="ExecuteSQLResponse">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="ExecuteSQLResult" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
</s:schema>
</wsdl:types>
- <wsdl:message name="ExecuteSQLSoapIn">
<wsdl:part name="parameters" element="tns:ExecuteSQL" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLSoapOut">
<wsdl:part name="parameters" element="tns:ExecuteSQLResponse" />
</wsdl:message>
- <wsdl:portType name="SQLplusWebServiceSoap">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLSoapIn" />
<wsdl:output message="tns:ExecuteSQLSoapOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:binding name="SQLplusWebServiceSoap" type="tns:SQLplusWebServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceSoap12" type="tns:SQLplusWebServiceSoap">
<soap12:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap12:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap12:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap12:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:service name="SQLplusWebService">
- <wsdl:port name="SQLplusWebServiceSoap" binding="tns:SQLplusWebServiceSoap">
<soap:address location="http://serverb:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceSoap12" binding="tns:SQLplusWebServiceSoap12">
<soap12:address location="http://serverb:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
Please advise me on how to fix the probelm. And please let me know any additional information is needed. Greatly appreciated~
Best regards,
Lawrence
Edited by: UMeng Lai on Feb 6, 2009 4:07 PMHi all,
We're using MII 11.5 and trying to call a web service from a Aspen Watch server through the web service block in transaction. The web service enclosed a function call ExecuteSQL which will accept a sql query function and return a set of Data. Now, using the same web service on two different servers, we got a success(server A) and a failure(Server B). On the failed call, right in the first page of enter a URL, it will return a "SOAP Service could not be loaded: The element type 'META' must be terminated by the machine end-tag '</META>'" error.
According to the admin of the web server, the web service on both servers can be called correctly when he created two simple ASP pages. After serious testing, he thought that the only reason should be MII may not be compatible with .Net 2.0 binding web service. The following is some comparison we made to the two servers.
Server A / Server B / Error, if applicable
.Net Framework installed on MII server: 1.1, 2.0 / 1.1, 2.0
.Net Binding: 1.1 / 2.0
IIS version on MII server: 6 / 6
From MII server broser to Server A web service: Yes / Yes
From MII server browser to Server B web service: No / No / Return on web "The test form is only available for requests from the local machine"
From localhost browser to Server A web service: n/a // Yes
From localhost browser to Server B web service: Yes // n/a
From PC browser to Server B web service: No / Yes / Return on web "The test form is only available for requests from the local machine"
Credentials required to run web service: No / Yes /
The following are the SOAP generated:
Server A
<?xml version="1.0" encoding="utf-8" ?>
- <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://www.aspentech.com/SQLplus.WebService/" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" targetNamespace="http://www.aspentech.com/SQLplus.WebService/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
- <wsdl:types>
- <s:schema elementFormDefault="qualified" targetNamespace="http://www.aspentech.com/SQLplus.WebService/">
- <s:element name="ExecuteSQL">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="command" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
- <s:element name="ExecuteSQLResponse">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="ExecuteSQLResult" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
<s:element name="string" nillable="true" type="s:string" />
</s:schema>
</wsdl:types>
- <wsdl:message name="ExecuteSQLSoapIn">
<wsdl:part name="parameters" element="tns:ExecuteSQL" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLSoapOut">
<wsdl:part name="parameters" element="tns:ExecuteSQLResponse" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpGetIn">
<wsdl:part name="command" type="s:string" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpGetOut">
<wsdl:part name="Body" element="tns:string" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpPostIn">
<wsdl:part name="command" type="s:string" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLHttpPostOut">
<wsdl:part name="Body" element="tns:string" />
</wsdl:message>
- <wsdl:portType name="SQLplusWebServiceSoap">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLSoapIn" />
<wsdl:output message="tns:ExecuteSQLSoapOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:portType name="SQLplusWebServiceHttpGet">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLHttpGetIn" />
<wsdl:output message="tns:ExecuteSQLHttpGetOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:portType name="SQLplusWebServiceHttpPost">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLHttpPostIn" />
<wsdl:output message="tns:ExecuteSQLHttpPostOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:binding name="SQLplusWebServiceSoap" type="tns:SQLplusWebServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceSoap12" type="tns:SQLplusWebServiceSoap">
<soap12:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap12:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap12:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap12:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceHttpGet" type="tns:SQLplusWebServiceHttpGet">
<http:binding verb="GET" />
- <wsdl:operation name="ExecuteSQL">
<http:operation location="/ExecuteSQL" />
- <wsdl:input>
<http:urlEncoded />
</wsdl:input>
- <wsdl:output>
<mime:mimeXml part="Body" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceHttpPost" type="tns:SQLplusWebServiceHttpPost">
<http:binding verb="POST" />
- <wsdl:operation name="ExecuteSQL">
<http:operation location="/ExecuteSQL" />
- <wsdl:input>
<mime:content type="application/x-www-form-urlencoded" />
</wsdl:input>
- <wsdl:output>
<mime:mimeXml part="Body" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:service name="SQLplusWebService">
- <wsdl:port name="SQLplusWebServiceSoap" binding="tns:SQLplusWebServiceSoap">
<soap:address location="http://clkaspenwatch:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceSoap12" binding="tns:SQLplusWebServiceSoap12">
<soap12:address location="http://clkaspenwatch:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceHttpGet" binding="tns:SQLplusWebServiceHttpGet">
<http:address location="http://servera:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceHttpPost" binding="tns:SQLplusWebServiceHttpPost">
<http:address location="http://servera:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
Server B
<?xml version="1.0" encoding="utf-8" ?>
- <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://www.aspentech.com/SQLplus.WebService/" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" targetNamespace="http://www.aspentech.com/SQLplus.WebService/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
- <wsdl:types>
- <s:schema elementFormDefault="qualified" targetNamespace="http://www.aspentech.com/SQLplus.WebService/">
- <s:element name="ExecuteSQL">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="command" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
- <s:element name="ExecuteSQLResponse">
- <s:complexType>
- <s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="ExecuteSQLResult" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
</s:schema>
</wsdl:types>
- <wsdl:message name="ExecuteSQLSoapIn">
<wsdl:part name="parameters" element="tns:ExecuteSQL" />
</wsdl:message>
- <wsdl:message name="ExecuteSQLSoapOut">
<wsdl:part name="parameters" element="tns:ExecuteSQLResponse" />
</wsdl:message>
- <wsdl:portType name="SQLplusWebServiceSoap">
- <wsdl:operation name="ExecuteSQL">
<wsdl:input message="tns:ExecuteSQLSoapIn" />
<wsdl:output message="tns:ExecuteSQLSoapOut" />
</wsdl:operation>
</wsdl:portType>
- <wsdl:binding name="SQLplusWebServiceSoap" type="tns:SQLplusWebServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:binding name="SQLplusWebServiceSoap12" type="tns:SQLplusWebServiceSoap">
<soap12:binding transport="http://schemas.xmlsoap.org/soap/http" />
- <wsdl:operation name="ExecuteSQL">
<soap12:operation soapAction="http://www.aspentech.com/SQLplus.WebService/ExecuteSQL" style="document" />
- <wsdl:input>
<soap12:body use="literal" />
</wsdl:input>
- <wsdl:output>
<soap12:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
- <wsdl:service name="SQLplusWebService">
- <wsdl:port name="SQLplusWebServiceSoap" binding="tns:SQLplusWebServiceSoap">
<soap:address location="http://serverb:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
- <wsdl:port name="SQLplusWebServiceSoap12" binding="tns:SQLplusWebServiceSoap12">
<soap12:address location="http://serverb:13080/sqlpluswebservice/sqlpluswebservice.asmx" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
Please advise me on how to fix the probelm. And please let me know any additional information is needed. Greatly appreciated~
Best regards,
Lawrence
Edited by: UMeng Lai on Feb 6, 2009 4:07 PM -
Problem about calling paint method
I have created a class to ask user input 3 floating-point numbers, using JApplet. the code list below
import java.awt.Graphics;
import javax.swing.*;
public class Numbers
double average,sum,product;
String result;
public void init()
String firstNumber,secondNumber,thirdNumber;
double num1,num2,num3;
firstNumber=JOptionPane.showInputDialog("enter first number");
secondNumber=JOptionPane.showInputDialog("Enter second number");
thirdNumber=JOptionPane.showInputDialog("Enter thrid number");
num1=Double.parseDouble(firstNumber);
num2=Double.parseDouble(secondNumber);
num3=Double.parseDouble(thirdNumber);
sum=num1+num2+num3;
product=num1*num2*num3;
average=(num1+num2+num3)/3;
result="";
if(num1<num2 && num2<num3)
result=result+num3+" is the largest number";
if(num2>num1 && num2>num3)
result=result+num2 +" is the largest number";
if(num1>num2 && num2>num3)
result=result+ num1+" is the largest number";
public void paint(Graphics g)
super.paint(g);
g.drawString("sum is"+sum,25,25);
g.drawString("product is"+ product,25,40);
g.drawString("average is"+ average,25,60);
g.drawString(" the largest number is"+result,25,80);
however, after I compiled, it gave me the error message as:
java:40: cannot resolve symbol
symbol : method paint (java.awt.Graphics)
location: class java.lang.Object
super.paint(g);
^(pointer should point to the dot)
don't know why,
Message was edited by:
ritchie_linyour class doesn't extend japplet or any other object for that matter. It does extend Object as all classes do, and Object has no paint method.
Consider changing:
public class Numbersto
public class Numbers extends JAppletAlso, please use code tags next time you're posting code.
Addendum: If this is not the JApplet portion of your code, it still has to subclass a Swing component that can accept painting such as JPanel. Also, with Swing you use paintComponent rather than paint.
Message was edited by:
petes1234 -
Question about calling batch file by using the System Exec+.vi?
Hi
I have a problem about calling batch file. I know that the system exec is equivalent to "run" in Windows. I called the batch file c:\rtxdos\bs\ch0.bat successfully in the "run" but it didn't work in the LabVIEW program. The dos prompt had an error message "Bad command or file name" and it just happen when I call this batch file in LabVIEW. Why?
Bill.Hi,
Try to set the "working directory" parameter of System exec.vi to the directory where the batch file is located. It may help.
Good luck.
Oleg Chutko. -
About calling method with arguments
Hi,
I have a problem about calling method using reflection. my method is like follows:
public myMethod(Integer var1, MyObject mobj) {
I've tried to call the method using the following code,
Class[] parameterTypes = new Class[] {Integer.class, MyObject.class};
Object[] arguments = new Object[] {new Integer(2), mobj};
Method met=cl.getMethod("myMethod", parameterTypes);
But the in the last line NoSuchMethodException is thrown.
How can I send the reference of MyObject to myMethod()?
Thanx
ronyShould work ok:
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class Test {
static class MyObject {}
public static void main(String[] args) throws Exception {
Class c = Test.class;
Class[] parameterTypes = new Class[] {Integer.class, MyObject.class};
try {
Object[] arguments = new Object[] {new Integer(2), new MyObject()};
Method met = c.getMethod("myMethod", parameterTypes);
met.invoke(new Test(), arguments);
} catch (NoSuchMethodException e) {
System.out.println(e);
} catch (IllegalAccessException e) {
System.out.println(e);
} catch (InvocationTargetException e) {
System.out.println(e);
public void myMethod(Integer var1, MyObject mobj) {
System.out.println("myMethod");
} -
Problem about Mac Os X 10.6.3 V.S Labview 2009
hi,labview~
i have some problem about Labview 2009.i saw the website of NI wrote the Labview 2009 is not support for Mac OSX 10.6.3,but i have already installed it (English system) in my computer successfully.
anyway,i cant open the programs which are wrote by labview 8.5(Japanese system) .My labmate who use Labview 2009(Mac OSX 10.5) can open those programs.
can anyone tell me the possible reason i cant open the programs?
Thanks a lot!
PS i have already tried Labview 8.5 and 8.6(English system),but the problem cant be solved....Hi mofi, my name is Taiki from National Instruments Japan.
I assume that the link you referred to is the one below, but as you stated, LabVIEW 2009 is not supported in Mac OS X 10.6 so even though you were able to install it successfully, NI cannot assure that it will fully function on your Mac.
LabVIEW Support for Mac OS 10.6 (Snow Leopard) and 10.5 (Leopard)
http://digital.ni.com/public.nsf/allkb/70F17A30DE7B865E8625737F006377F8?OpenDocument
Since you mentioned that the VI files were able to be opened on LabVIEW 2009, Mac OS X 10.5, the actual VI files should not be the issue which leaves us with the possibility of the software environment.
You also noted that the issue could not be solved on LabVIEW 8.5 and 8.6 but was this on Mac OS X 10.6 as well?
If so, there is a good chance that this issue is due to the fact that LabVIEW is running on an supported OS and I would suggest trying opening the files on another different Mac OS X 10.5 system.
Unfortunately, currently Mac OS X 10.6 is an unsupported OS for any version of LabVIEW so I can only suggest trying on a Mac OS X 10.5.
Kind regards.
Taiki Hoshi
Applications Engineer
National Instruments Japan -
HI
I have a strange problem concerning group call pickup in lync 2013.the pickup calls on snom 710 having only a second delay, but in lync client it having about 5-7 second
Anybody out there having similar problems with call pickup Groups?Hi,
Did you meet any other call delay when you using Lync?
As the issue happen for Lync desktop client, it can be performance issue. Please check if there is any error message from FE Server when the issue happen.
Also please check if you have updated Lync Server to the latest version, if not, update it and then test again.
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support -
Does anybody can give me a simple example about the labview programme calling dll ?
Does anybody can give me a simple example about the labview programme calling dll ?And the dll is also writed by using labview .I just want to study the process of the labview programme calling dll file.Thank you!
Hi,
Please click on "Find Examples" in the "Getting Started Window"
A window named "NI Example Finder" will pop up.
In this go to "Search" tab
Type "DLLs"
You will see a lot of examples.
If you're online, you'll see user examples too... -
The Problem about Monitoring Motion using PCI-7358 on LabVIEW Real Time Module
Hello everyone,
I have a problem about monitoring the position of an axis. First let me give some details about the motion controller system I’m using.
I’m using PCI-7358 as controller and MID-7654 as servo driver, and I’m controlling a Maxon DC Brushed motor. I want to check the dynamic performance of the actuator system in a real time environment so I created a LabVIEW function and implemented it on LabVIEW Real Time module.
My function loads a target position (Load Target Position.vi) and starts the motion. (Start.vi) then in a timed loop I read the instantaneous position using Read Position.vi. When I graphed the data taken from the Read Position.vi, I saw that same values are taken for 5 sequential loops. I checked the total time required by Read Position.vi to complete its task and it’s 0.1ms. I arranged the loop that acquires the data as to complete its one run in 1ms. But the data shows that 5 sequential loops read the same data?Read Position.flx can execute much faster than 5 ms but as it reads a register that is updated every 5 ms on the board, it reads the same value multiple times.
To get around this problem there are two methods:
Buffered High-Speed-Capturing (HSC)
With buffered HSC the board stores a position value in it's onboard buffer each time a trigger occurrs on the axis' trigger input. HSC allows a trigger rate of about 2 kHz. That means, you can store a position value every 500 µs. Please refer to the HSC examples. You may have to look into the buffered breakpoint examples to learn how to use a buffer, as there doesn't seem to be a buffered HSC example available. Please note that you need an external trigger-signal (e. g. from a counter of a DAQ board). Please note that the amount of position data that you can acquire in a single shot is limited to about 16.000 values.
Buffered position measurement with additional plugin-board
If you don't have a device that allows you to generate a repetitive trigger signal as required in method 1.), you will have to use an additional board, e. g. a PCI-6601. This board provides four counter/timers. You could either use this board to generate the trigger signal or you could use it to do the position capturing itself. A PCI-6601 (or an M-Series board) provides can run a buffered position acquisition with a rate of several hundred kHz and with virtually no limitation to the amount of data to be stored. You could even route the encoder signals from your 7350 to the PCI-6601 by using an internal RTSI cable (no external wiring required).
I hope this helps,
Jochen Klier
National Instruments -
Some errors when calling LabVIEW VIs Interactively from DIAdem
Hi! I'm having some trouble using the "Calling LabVIEW VIs Interactively from DIAdem" found on:
http://zone.ni.com/devzone/conceptd.nsf/webmain/1A98AB48E35D913086256E23004E6A22
Following the troubleshooting section didn't resolve the issue. I
recompiled and built the exe (DIAdemLabVIEW.exe) for version 7.1.1,
which I am developing on. But still I got the same error message, after
a waiting for about a minute, on a diadem popup window:
Error in <MenuAdd...ctDo.vbs (row:1, column: 1)
Error in <addmenuentry.vbs (row:14, column: 3)
ActiveX component can't create object.: 'DIAdemLabWIEV.Application'
Using the llb's and exe's that was included with the installer worked
flawless, with the exception that LV 7.1.1 vi's didn't appear on the
popup window(DIAdemLabWiev.vi). So I tried to recompile and build for
the 7.1.1, with this result.
I'd be very grateful for fixes or solutions for this problem!
Regards
Roger IsakssonBrad, thanks for the reply! Below is my (correct?) modification of your script. Have I got it right?
Dim lvapp, vi, viPath, paramName(1), paramVal(1)
Set lvapp = CreateObject("LabVIEW.Application")
viPath = "C:\TEMP\Test.exe"
Set vi = lvapp.GetVIReference(viPath)
vi.FPWinOpen = True
paramName(0) = "In Name"
paramVal(0) = "In Value"
paramName(1) = "Ut Name"
Call vi.Call(paramName, paramVal)
Call lvapp.Quit()
MsgBox "Parameter1 Value = " & paramVal(1)
I am not sure about the format of the <paramName(0) = "In Name">.
The control name is "In" and is a I32, the name for the indicator is
"Ut" and has the same storage type as the control.
Running the script gives an error in line 4, that is the <Set vi =
lvapp.GetVIReference(viPath)>. I'll attach the exe and the error
message.
I have another question regarding the relatively large amount of RAM
that diadem uses for export from my labview application to diadem. More
than 10 times the size of the data is required for exporting to diadem.
Since our application use relatively large files, actually up to
several GB's, this soon becomes problematic. See the attached picture
of the memory usage after exporting a 10MB segment (contains 42
channels of measurement data). Your help in these matters would be
appreciated!
Regards
Roger Isaksson, Damill AB
Message Edited by Roger Isaksson on 09-09-2005 10:22 AM
Message Edited by Roger Isaksson on 09-09-2005 10:22 AM
Attachments:
VBError.JPG 181 KB
Test1.vi 9 KB -
How to call labview DLL from C#, passing char, char[], float[], long, short
Hi,
I'm having trouble calling labview dll from C# to perform certain function.
The function supposed to return the values in the float Analysis[] array. However, when I execute it it only returns zero values.
It seems that some parameters are not properly passed to the dll.
Below is the function in the header file:
void __stdcall Optical_Center(char FileDirectory[], long ImagePtr,
short int Height, short int Width, char ReadFromFile, float Analysis[],
long lenAnalysis);
and my corresponding dll import in c#:
[DllImport(@"SMIA.dll", CharSet = CharSet.Ansi)]
public static extern void Optical_Center([MarshalAs(UnmanagedType.LPStr)]string FileDirectory, long ImagePtr,
short Height, short Width,char ReadFromFile, IntPtr Analysis,
long lenAnalysis);
string str = @"C:\SMIA.raw";
int len = 3;
long m_lenAnalysis = 3;
long m_ImagePtr = 0;
short m_Height = 2464;
short m_Width = 3280;
IntPtr m_PtrArray = Marshal.AllocHGlobal(len * Marshal.SizeOf(typeof(float)));
char m_ReadFromFile = '1';
Optical_Center(str,m_ImagePtr,m_Height,m_Width,m_ReadFromFile,m_PtrArray,m_lenAnalysis);
float[] m_Analysis = new float[len];
Marshal.Copy(m_PtrArray, floatArray,0,len);
Marshal.FreeHGlobal(m_PtrArray);
string printstr = "";
for (int i=0; i<len; i++)
printstr = printstr + floatArray[i].ToString() + "\n";
MessageBox.Show(printstr);
Appreciate if anyone can help, thanks.
KLI was just about to post the header file of the DLL, when
I noticed that there's a function called LVDLLStatus.
This little thingie turned out to be a rather handy tool.
With that function I found that in the DLL I had a problem
with another function that prevented the DLL to be correctly
loaded.
This other function in the DLL is for generating digital output
and it worked as it should, when tested from LV.
Anyway if someone is interested, I got it working by using
the LoadLibrary and GetProcAddress function, as in the
source code thatI posted earlier.
I will investigate what is wrong with that digital output, and
post into a another thread if I have problems with that.
Maybe you are looking for
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Ical thru isync to two computers what happens after the initial reset
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