Least squares method from file

hi i have a final project i have to write least squares best fit vi,vi should read the datas from a txt file and draw best fit line according to least squares method calculations and also it should show the datas in point form pls help to me i tried a lot but i got nothing...thx

Hi,
I recommend that you search the following websites for assistance:
www.ni.com
www.ni.com/community
Kareem W.
National Instruments
Web Product Manager

Similar Messages

The covariance of the least square methods

what is the meaning of the covariance? In the least square method fitting problems ,if I should make it equal to zero??
If it isnt equal to zero ? what is the matter?
thanks for any one can explain it to me !
As a man you should be ....

Hi Sharad,
Try to rename the component name and reload+rebulid the project.
If there is any build errors try to repair the DC with classpath structure and deploy the DC in server.
Hope this helps you...
Regards,
Saleem Mohammad

Least squares from file

hi i have a final project i have to write least squares best fit vi,vi should read the datas from a txt file and draw best fit line according to least squares method calculations and also it should show the datas in point form pls help to me i tried a lot but i got nothing...thx

Hey siktigit ys,
There are built in Least Square Fit functions in LabVIEW. Here is some information about them. If you are having trouble reading the data from the file, here is an example showing how to use the read and write VIs. In order to show your data in a graph, I'd just read the data from the text files into an array and display that array on an XY graph. That should be enough to get you started. If you need more help, just let me know and have a great weekend!
John B.
Embedded Networks R&D
National Instruments
Certified LabVIEW Developer

Multi variate damping least square solver

Hello all,
I am hoping to get some advice and a starting point for a challenging problem I am working on.
I have a 33x37 matrix that i need to minimize using a damping least square approach. in order to achieve the minimization I need to use a set of 50 Matrices (33x37, representing adjustment impacts) that are grouped in 12 separate catagories with different starting points and degrees of freedom, and none of the adjustment matrices are truly independent of each other (they all interact with each other to some extent.)
For the output I need the minimized matrix and the amount of each vector applied to achieve the minimized solution.
To hopefully clarify the inputs and outputs I have included an example vi with a dummy set of data.
I am hoping that someone can give me an idea of where to start, can this be accomplished using the labview libraries or will this have to use scripting via a mathscript node, or matlab? If it can be done in different ways which method is the most efficient?
I hope this is enough information, but if you need more details please let me know, although giving exact details can be difficult in this case due to IP considerations.
As always thank you in advance for any help/suggestions you may be able to offer.
Chris
Attachments:
example2.vi ‏25 KB

Other then using a least square method I dont have a function defined yet (trying to figure out what function to use), but essentially I am trying to find out how much of each of the adjustment matrices need to be applied to minimize the original matrices..
I hope that explains what i am trying to do a little better

Calling a method from another file

This is pretty basic stuff but i can't seem to get it right. I am calling a method from another file. The other file IS located in the same folder BUT when i compile i get errors
"cannot find symbol" <===referring to limit and sieve i believe.
The method name is "sieve" the file name is "PrimeSieve2008" and "limit" is the variable in brackets in the real method.
     public static void main (String [] args) {
final int [] PRIMES;
int sieve = PrimeSieve2008.sieve(limit);
     PRIMES = sieve(getValidInt());
          for (int j = 0; j<PRIMES.length; j++) {
               System.out.println("Prime[" + j + "] = " + PRIMES[j]);
Is "int sieve = PrimeSieve2008.sieve(limit)" the wrong way to call a file?
Thanks a million,
Alex
Edited by: Simplistic2099 on Apr 3, 2008 7:47 PM
Edited by: Simplistic2099 on Apr 3, 2008 7:49 PM

Simplistic2099 wrote:
the other method runs fine:
"public static int[] sieve(final int limit){
int candidate; // possible prime
int count; // no. of primes found
boolean[] mayBePrime = new boolean[limit+1];
// remaining possibilities
final int[] PRIMES; // array to return
// initialize mayBePrime
for ( int j = 0 ; j <= limit ; j++ ) {
mayBePrime[j] = true;
mayBePrime[0] = mayBePrime[1] = false;
// apply sieve, and count primes
candidate = 2;
count = 0;
while ( candidate <= limit ) {
if ( mayBePrime[candidate] ) {
count++;
for ( int j = 2 * candidate ; j <= limit ; j += candidate ) {
mayBePrime[j] = false;
} // end for
} // end if
candidate++;
} // end while
// fill up new array with the primes found
PRIMES = new int[count];
count = 0;
for (int j = 2 ; j <= limit ; j++ ) {
if ( mayBePrime[j] ) {
PRIMES[count] = j;
count++;
} // end if
} // for
return PRIMES;
} // sieve
I really am clueless here.in this one you are passing in limit.
in the other one you are getting limit from somewhere outside of main.

SSIS Not Detecting Input Service or Method from WSDL File

I have a WSDL file saved locally (first downloaded from a developer kit, which instructs to save it locally and NOT download it from a public URL), and I'm trying to use it in a Web Service Task in SSIS (2008 R2 Enterprise Edition). I'm pointing to the local
file in the Web Service Task Editor (General tab). The HTTP Connection is pointing to a URL that has had a successful test connection in the HTTP Connection Manager.
However, the Input tab dropdown menus for selecting Service and Method are blank. I'm not getting any errors about the WSDL file itself. It looks to be well-formed and valid. I'm not sure why SSIS isn't detecting the services and methods from the WSDL document.
I tried saving a different WSDL document locally from
http://graphical.weather.gov, and that worked in a different Web Service Task. I'm guessing there's something wrong with the structure of the WSDL. I saw this
similar post that makes me think this is indeed the case.
The WSDL was accessed with account credentials, so I've redacted identifying information in the code below:
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions name="Service" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:error="http://www.[redacted].com/error" xmlns:co="http://www.[redacted].com/co" xmlns:srv="http://www.[redacted].com/srv" xmlns:tns="http://www.[redacted].com/tns" targetNamespace="http://www.[redacted].com/tns">
<wsdl:types>
<xsd:schema>
<xsd:import namespace="http://www.[redacted].com/XMLSchema/1" schemaLocation="1.xsd"/>
<xsd:import namespace="http://www.[redacted].com/XMLSchema/2" schemaLocation="2.xsd"/>
<xsd:import namespace="http://www.[redacted].com/XMLSchema/3" schemaLocation="3.xsd"/>
</xsd:schema>
</wsdl:types>
<wsdl:message name="ServiceRequestMessage">
<wsdl:part name="Body" element="srv:ServiceRequest"/>
<wsdl:part name="security" element="co:security"/>
</wsdl:message>
<wsdl:message name="ServiceResponseMessage">
<wsdl:part name="Body" element="srv:ServiceResponse"/>
</wsdl:message>
<wsdl:message name="ServiceErrorMessage">
<wsdl:part name="ServiceError" element="error:Errors"/>
</wsdl:message>
<wsdl:portType name="ServicePortType">
<wsdl:operation name="ProcessService">
<wsdl:input name="ServiceRequest" message="tns:ServiceRequestMessage"/>
<wsdl:output name="ServiceResponse" message="tns:ServiceResponseMessage"/>
<wsdl:fault name="ServiceError" message="tns:ServiceErrorMessage"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="ServiceBinding" type="tns:ServicePortType">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="ProcessService">
<soap:operation soapAction="http://soap.[redacted].com/binding" style="document"/>
<wsdl:input name="ServiceRequest">
<soap:body parts="Body" use="literal"/>
<soap:header message="tns:ServiceRequestMessage" part="security" use="literal">
<soap:headerfault message="tns:ServiceErrorMessage" part="ServiceError" use="literal"/>
</soap:header>
</wsdl:input>
<wsdl:output name="ServiceResponse">
<soap:body parts="Body" use="literal"/>
</wsdl:output>
<wsdl:fault name="ServiceError">
<soap:fault name="ServiceError" use="literal"/>
</wsdl:fault>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="ServiceService">
<wsdl:port name="ServicePort" binding="tns:ServiceBinding">
<soap:address location="https://ws.[redacted].com/service"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
Is there anything in this WSDL that SSIS does not support? Or am I just missing something simple? Thanks.

Hi, you may want to walk through the following threads:
http://blogs.msdn.com/b/dataaccesstechnologies/archive/2010/01/28/consuming-web-services-in-ssis-script-task.aspx
http://stackoverflow.com/questions/21596429/using-https-wsdl-in-visual-studio-ssis
http://www.bidn.com/blogs/BillBrannen/bidn-blog/619/ssis-web-service-task-step-by-step
Regards, Leo

How to use methods from a JAR file inside my springcontext (Oracle fusion 12c) class file?

Dear Friends,
I have a jar file, which has executed classes and methods in it. I want to make use of these methods inside my springcontext piece of code.
Can someone please share an example of how to write spingcontext code which is accessing classes/methods from JAR files along with the any setup?
Thanks,

I have found the answer... as described in:
http://java.sun.com/javase/6/docs/technotes/guides/lang/resources.html
the problem was that the properties are loaded with the getResource & getResourceAsStream methods and I didn't know that one. I thought that is was loaded through findClass because I saw the property files trying to be loaded through findClass.
The truth is that it tries to load with the getRessources methods and if it fails tries with the findClass/loadClass.
To Fix the problem, I have simply overriden the getRessourceAsStream to do my magic and that was it.
Thanks

Calling method from jsp file

Hi
is it possible to call any method with in the class except handle method from jsp file?

You can call , but it would not be a good design approach.A droplet can do the same task for you.
otherwise :
eg :
<%@ page import="com.mypackage.MyClass"%>
for Static access :
<%
String test= MyClass.myMethod();
%>
for normal classes :
<%
MyClass object = new MyClass();
String test= object .myMethod();
%>
http://stackoverflow.com/questions/10918526/call-java-method-in-jsp-file
http://www.javaworld.com/javaworld/jw-05-2003/jw-0523-calltag.html?page=2
```
Praveer
Edited by: Praveer Rai on Mar 26, 2013 5:08 PM

How to find the arguments of a static method from the class file

Hi,all !
How to find the arguments of a static method from the class file? for example, when we meet a bytecode "invokestatic", how can I know the arguments of this static method?

Hi,all !
How to find the arguments of a static method from the
class file? for example, when we meet a bytecode
"invokestatic", how can I know the arguments of this
static method?You mean
1. The values?
2. Argument names?
3. Argument signatures.
I would suppose for the last that the easiest way would be to parse the signature string.
The first is not possible - not from the class file.
The second is only in the debug information stored in the optional part of the class file. And figuring out the format for that is going to be a problem.

Cannot print from file drop down menu, nor any other usual method in firefox 6.0 for win 7 home prem 64 bit

when i try to print from your browser i click on file then choose print and nothing happens, nothing happens when i try it from file drop down and click on print preview, this is the case with Firefox 4 5 and 6! with win 7 home premium 64 bit
it will not even let you print from the rt. click menu, that selection is not highlighted when you select a word a sentence a page or anything, and there is no print icon available in your customize the toolbar menu either, the only way I can print a page from your browser is to open internet explorer and dag the page from your browser to msie and have that browsers printer icon clicked on and it prints using m.s.i.e. 9 .
in short there is no way to print from your browser, that I have located???????? help me

when i try to print from your browser i click on file then choose print and nothing happens, nothing happens when i try it from file drop down and click on print preview, this is the case with Firefox 4 5 and 6! with win 7 home premium 64 bit
it will not even let you print from the rt. click menu, that selection is not highlighted when you select a word a sentence a page or anything, and there is no print icon available in your customize the toolbar menu either, the only way I can print a page from your browser is to open internet explorer and dag the page from your browser to msie and have that browsers printer icon clicked on and it prints using m.s.i.e. 9 .
in short there is no way to print from your browser, that I have located???????? help me

Declaring callbacks via config file: assigning method from a string

Hello together,
For a game project I am using Apache Commons Digester for creating object trees from an XML config (done by XML to object mapping just like in Castor or Betwixt).
For the configugration of the keyboard, I would like to declare callback methods that the keyboard class shall invoke on a given object, e.g.:
<keyboard>
<event key="F11" method="Engine.getDisplay.toggleFullscreen()" />
</keyboard>
The main problem I see to interprete the thing in the method attrib? What is the best method to create this binding in my source? Are there any utils you know or do I have to parse the string myself in order to realise such a callback? I.e. how to get an instance of java.lang.reflect.Method from such a string?
Thank you for any proposals!
Greetings, Timo

I know you can loop through the methods of the given class and look for one with the right signature.

Time Stamp format from file problem

Hey there,
I have a pretty peculiar problem. I'm working on two PCs right now, one is my private laptop running on Windows 8, and the other one the PC at my workplace, running on Windows XP, but on the same version of LabVIEW. I use this method to save the time and date to a tab delimited .txt file. Then later, with another VI, I read the date and time written to file to reconstruct the time stamp. I've noticed that dates written to file from my workplace differ from the dates written from my private PC: in Windows XP, there are "-" separating the day, month and year. In Windows 8, it's "/". There are other differences (see pictures). So naturally, when reading from file using my VI, I can only read on my private PC files (or at least dates) written on my private PC and vice versa, I can't read files written on my private PC on my workplace PC. Can anybody tell me why there's a difference in format, or how to write the date uniformly so I can read it on any PC, or how to read both formats?
So this is the method I use for writing the time and date (the subVI only inserts a certain number of TAB characters).
This is what it looks like on Windows 8
This is what it looks like on Windows XP
This is the VI (attached) I use to read the time stamps (the first row actually contains the time stamp in HH:MM: SS format for a whole bunch of measurements).
Have a nice day.
Solved!
Go to Solution.
Attachments:
Extract Time Stamps.vi ‏22 KB

I would suggest using the ISO-8601 UTC format.
The only limitation is that the string value is in reference to GMT.
The conversion of the string back to a timestamp will present the date/time on your front panel indicator as local time.
https://lavag.org/topic/15034-timestamp-support-for-format-into-string-scan-variant-from-string-stri...
Now is the right time to use %^<%Y-%m-%dT%H:%M:%S%3uZ>T
If you don't hate time zones, you're not a real programmer.
"You are what you don't automate"
Inplaceness is synonymous with insidiousness

How to call a set method from within a constructor

Hello,
I want to be able to call a set method from within a Scanner, to be used as the argument to pass to the Scanner (from a source file). Here's what i tried:
private void openFiles()
        input = new Scanner( setSource );
    and here is the set method:
public String setSource( String in )
        source = in;
        return source;
    }obviously there will be more code in this method but i'm trying to tackle one problem at a time. Thanks in advance..

The "String in" declaration says: "Nobody may ever invoke setSource() without specifying a certain String. The content of the String is known at run-time only."
In no place in your code you say the compiler: "I want the 'in' variable (actually, parameter) of method setSource() to contain the first arg which is passed to the application".
This is exactly the same mechanism allowing you to write "new Scanner" with something inside the two parentheses.

Error: You must have at least 1 Easy Setup File?

I just upgraded from FCE 1.0.1 to FCE HD v3.0. I have Quicktime 7.4.5 & OS X 10.4.11
When I launch, it takes forever because it's trying to load all my audio plugins into it and then at the end of that I get this error message:
Unable to start Final Cut Express HD. You must have at least 1 Easy Setup file. Please re-install Final Cut Express HD and try again.
Since it takes so long to install and I've already done it twice now...to no avail mind you...I was wondering if a guru or enlightened person would fill me in with what's going on and what I might do about it?

You may as well get rid of everything as we don't know where the problem lies.
This says FCE 2 but it is for FCE 1.0.1 as well. Remember many of the FCE 3.0 and FCE 1.0.1 files will be the same/shared.
http://docs.info.apple.com/article.html?artnum=93690
When you reinstall, do not install FCE 1.0.1.
Simply install FCE 3.0 and you will be asked at some point for the FCE 1.0.1 serial number as well.

Net.sf.jasperreports.engine.JRException: Error loading object from file : C

I started using JasperReports for my web application report generation. I'm using JSPs for web development.
I created a .jrxml file using iReport and used the following code to generate the report.
try {
          JasperDesign jasperDesign = JRXmlLoader.load("C:\\tomcat\\webapps\\web\\JSP\\reports\\samples\\pmm-final.jrxml");
          JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
// Second, create a map of parameters to pass to the report.
          Map parameters = new HashMap();
          parameters.put("Title", "JasperReport");
// Third, get a database connection
          Connection conn = null;
          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          conn=DriverManager.getConnection("jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=C:/tomcat/webapps/db1/db1.mdb");
// Fourth, create JasperPrint using fillReport() method
          JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport,
                              parameters, conn);
// You can use JasperPrint to create PDF
          //JasperExportManager.exportReportToPdfFile(jasperPrint, "C:\\tomcat\\webapps\\web\\JSP\\reports\\TestReport.pdf");
          JasperExportManager.exportReportToHtmlFile(jasperPrint, "C:\\tomcat\\webapps\\web\\JSP\\reports\\TestPMM.html");
          JRXlsExporter exporter = new JRXlsExporter();
          exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
          exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, "C:\\tomcat\\webapps\\web\\JSP\\reports\\TestPMM.xls");
          exporter.exportReport();
// Or to view report in the JasperViewer
          //JasperViewer.viewReport(jasperPrint);
} catch (JRException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
} catch (SQLException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
The above pmm-final.jrxml uses a subreport 'top.jasper'. Error being thrown while loading top.jasper file. Error is as follows.
java.io.InvalidClassException: net.sf.jasperreports.engine.base.JRBaseReport; lo
cal class incompatible: stream classdesc serialVersionUID = 604, local class ser
ialVersionUID = 606
at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:86
at net.sf.jasperreports.engine.util.JRLoader.loadObjectFromLocation(JRLo
ader.java:236)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubre
port.java:295)
at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:
340)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageBand(JRVert
icalFiller.java:1224)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageHeader(JRVe
rticalFiller.java:353)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRV
erticalFiller.java:205)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVertic
alFiller.java:119)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:
613)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:
483)
at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:77
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillMa
nager.java:248)
at org.apache.jsp.JSP.UserGuide_jsp._jspService(org.apache.jsp.JSP.UserG
uide_jsp:74)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:325)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:2
95)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:214)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:306)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:745)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.ja
va:675)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:868)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
at java.lang.Thread.run(Unknown Source)
NESTED BY :
java.io.InvalidClassException: net.sf.jasperreports.engine.base.JRBaseReport; lo
cal class incompatible: stream classdesc serialVersionUID = 604, local class ser
ialVersionUID = 606
at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:86
at net.sf.jasperreports.engine.util.JRLoader.loadObjectFromLocation(JRLo
ader.java:236)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubre
port.java:295)
at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:
340)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageBand(JRVert
icalFiller.java:1224)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageHeader(JRVe
rticalFiller.java:353)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRV
erticalFiller.java:205)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVertic
alFiller.java:119)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:
613)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:
483)
at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:77
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillMa
nager.java:248)
at org.apache.jsp.JSP.UserGuide_jsp._jspService(org.apache.jsp.JSP.UserG
uide_jsp:74)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:325)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:2
95)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:214)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:306)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:745)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.ja
va:675)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:868)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
at java.lang.Thread.run(Unknown Source)
NESTED BY :
net.sf.jasperreports.engine.JRException: Error loading object from file : C:\tom
cat\webapps\web\JSP\reports\samples\top.jasper
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:90
at net.sf.jasperreports.engine.util.JRLoader.loadObjectFromLocation(JRLo
ader.java:236)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubre
port.java:295)
at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:
340)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageBand(JRVert
icalFiller.java:1224)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageHeader(JRVe
rticalFiller.java:353)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRV
erticalFiller.java:205)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVertic
alFiller.java:119)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:
613)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:
483)
at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:77
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillMa
nager.java:248)
at org.apache.jsp.JSP.UserGuide_jsp._jspService(org.apache.jsp.JSP.UserG
uide_jsp:74)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:325)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:2
95)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:214)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:306)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:745)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.ja
va:675)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:868)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.InvalidClassException: net.sf.jasperreports.engine.base.JRBas
eReport; local class incompatible: stream classdesc serialVersionUID = 604, loca
l class serialVersionUID = 606
at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:86
... 33 more
Anyone pls help. It's bit urgent. Thanks.

I was using iReport v0.5.0 and it uses jasperreports-0.6.7.jar (v0.6.7) of
JasperReports. I compiled and i deployed my application in BEA weblogic server. I got the error listed below. Only after i saw your
response explaining that iReport was the issue, i checked the iReport lib directory and found this version of jasperreport jar.
iReport creates a java source file which is used to a jasper file.
iReport will link in the v0.6.7 version of jasperReports. When you
deploy your web application it will recognize this version through the compiled jasper file and give you the InvalidClassException, even
though you only have one jasperReport jar deployed with your war file.
The way i fixed this problem was to create my web application with the
jasperreport jar comes with iReport.
Thanks for mentioning iReport.
Christopher
Error:
Caused by: java.io.InvalidClassException: net.sf.jasperreports.engine.base.JRBas
eReport; local class incompatible: stream classdesc serialVersionUID = 607, local class serialVersionUID = 10002
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:463)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1521)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1521)
...

Least squares method from file

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