TCP/IP communication with Matlab

Since LabVIEW unwisely depends on Microsoft only constructs to communicate with Matlab, has anybody succeeded in piping commands/data from a LabVIEW session running on a Mac / Linux to a Matlab session running on the same machine ? Use of MathScript is not an option since MathScript does not have all the toolboxes and more critically, does not offer a programmatic way of saving plots (the print command).

Yes, Microsoft has provided COM tools for the MAC OS. This article provides a brief overview.
Also, LabVIEW has a number of tools for configuring and programmtically printing and saving plots. I do not believe it appropriate to discuss notions of platform superiority. I simply would like you and future forum readers to be aware of the tools available in LabVIEW for plotting tasks:
Customizing Graphs and Charts
http://zone.ni.com/reference/en-XX/help/371361G-01/lvconcepts/customizing_graphs_and_charts/
In addition, there are a number of image tools available:
NI LabVIEW Modules and Toolkits for Image and Signal Processing
http://www.ni.com/labview/family/image_signal_processing.htm
Cheers,
Patrick Corcoran
Application Engineering Specialist | Control
National Instruments

Similar Messages

Communication with matlab

Hi,
I have a problem(in HiQ ver4.1) in communicating with Matlab(ver 5.3.1).
That problem is as below.
>matlab
>>x=eye(2)
x =
1 0
0 1
>>x
??? Undefined function or variable 'x'.
>>
What's wrong???
I have launched matlab with "/regserver" option.
Please answer me if you know.
E-Mail : [email protected]

http://www.mathworks.com/access/helpdesk/help/techdoc/matlab_external/ch_java2.shtml
http://www.mathworks.com/support/solutions/data/23128.shtml
http://www-rohan.sdsu.edu/doc/matlab/techdoc/matlab_external/ch_java.html

TCP/IP communication with remote host

Hey guys,I wrote a class for TCP/IP communication with remote host.I am trying to use this class in following way:Its not working.One thing I am not sure about if I can give IP address of the machine while creating a socket.Please take a look at my program and let me know where i am doing wrong.Help me!
CommunicationAgent commAgent;
commAgent= new TCPIPCommAgent();
writer = commAgent.getWriter("CASS");
/* Send GC request message to CASS */
writer.print(searchduedateRequestMsg);
/* Get reader object to read TCP IP response from CASS */
reader = commAgent.getReader("CASS");
/* Read response message */
String respMsg = reader.readLine();
if(respMsg!=null)
System.out.println("Search due date Response from CASS is:" +respMsg);
else
System.out.println("Error in reading search due date response");
and here is my class responsible for TCP/IP communication:
* Created on Jul 15, 2004
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
package com.prtc.commif.framework;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Properties;
import com.prtc.commif.framework.interfaces.CommunicationAgent;
import com.prtc.commif.util.InputResources;
* @author spolireddy
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
public class TCPIPCommAgent implements CommunicationAgent
public BufferedReader getReader(String system)
InputResources inputResources = new InputResources();
Properties props=inputResources.getProperties(system + ".properties");
Socket socket=null;
BufferedReader in=null;
//Get this from the properties
String hostName = "113.132.192.21";
//Get this from the properties
int port = 10103;
try
socket = new Socket(hostName, port);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
catch (UnknownHostException e)
System.err.println("Unable to identify the Host: " + hostName + ":" + port);
System.exit(1);
catch (IOException e)
System.err.println("Couldn't get I/O for the connection to: " + hostName + ":" + port);
System.exit(1);
return in;
public PrintStream getWriter(String system)
InputResources inputResources = new InputResources();
Properties props=inputResources.getProperties(system + ".properties");
Socket socket=null;
PrintStream out=null;
//Get this from the properties file
String hostName = "113.132.192.21";
//Get this from the properties file
int port = 10103;
try
socket = new Socket(hostName, port);
out = new PrintStream(socket.getOutputStream(), true);
catch (UnknownHostException e)
System.err.println("Unable to identify the Host: " + hostName + ":" + port);
System.exit(1);
catch (IOException e)
System.err.println("Couldn't get I/O for the connection to: " + hostName + ":" + port);
System.exit(1);
return out;

Hi,
Yes, you can specify ip-address as host-address.
What do you expect the class to do? Why does reader and writer both open sockets?
What happens when you run the program?
/Kaj

TCP/IP communication with LabVIEW Full?

Hi,
I would like to know if the TCP/IP VIs are included with the Base or Full version of LabVIEW?
I was looking at the different versions of LV and one of the features of the Pro version is 'Network Communication'.
I have done TCP/IP communication a while ago and I am quite sure it was with the Full version. I have the Pro version now but this is for a customer.
This brings another question: Is there a trick to be sure your code is going to work on a system with LV Base if you develop on a system with LV Pro?
Thanks!

I think that was a good answer to your first question. To answer your second question, if you are creating executables to be run on a computer with LabVIEW Base there will be no problem running the executable because LabVIEW Base has the run time engine. If you are sending VIs to another computer with LabVIEW Base they will not be able to access any VIs that are not included in there package. There is no simple way to tell that these VIs are not included except through the link in the previous post. In LabVIEW 8.6 many of the help documents state what LabVIEW package installs the VI. If all of the VIs state that they are installed with LabVIEW Base you will have no problems.
Vince M
Applications Engineer

Adapter for TCP/IP communication with XI

Hi Experts,
The provider of the external system sez he will use TCP/IP communication...
wat adapter do we have to use in XI?? pls help

TCP/IP is a connection oriented network protocol. TCP - Transmission control protocol IP - internet protocol.
TCP/IP is a 7 layers model and the top layer is a application layer where all the applications or services are supported such as file, HTTP, Webservice etc.... PI adapters are application layer services. SO PI can support all the current adapters.
>>wat adapter do we have to use in XI?? pls help
Since TCP/IP establishes connectivity between one system to another system using network protocol, PI can use that connection for communication. You can use any adapter that PI supports. please elaborate your question.
Link: http://www.tcpipguide.com/free/t_ApplicationLayerLayer7.htm

Tcp/ip communication with LabVIEW

Does anyone have experience building an application with LabVIEW that
communicates over a socket? I new to LV, but it appears that the
application I have in mind is possible. Specifically, the LV
application would open a socket (port and IP known ahead of time) and
send a character to that socket. Depending on the character sent, the
application on the other end (a UNIX process) would send back a one
integer value to indicate the number of packets to expect. The LV
application would next need to parse each packet for such things as the
packet length, data length and so forth and then distribute those data
to appropriate sub-processes. The header value types are integer,
double, byte and character. The data values are all 4-
byte integers.
The sending code (on the UNIX side) was written in C. The aggregate
throughput is relatively low; no more than 2,000 bytes per second,
including packet headers.
If I can get this to work, the results would represent a significant
cost savings over competing alternatives. As a federal employee, I'm
always looking for the most cost effective solutions.
Thanks.
-Robert
Basically, I'm just looking for confirmation that this sort of thing is
possible with LV. And, I'd like to get a better idea of how hard it
would be to do.
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.

Hi everyone,i am currently trying to communicate with two computers at the moment using TCP/IP.I have done a simple server and client VI but the server doesnt seem to be writing the string im trying to send and it also gives an error message
Error 1 occurred at TCP Write in Server.vi
Possible reason(s):
LabVIEW: An input parameter is invalid. For example if the input is a path, the path might contain a character not allowed by the OS such as ? or @.
Please find attached the simple server and client VIs i have done.can you help me?
Thanks
Osowoaji
Attachments:
Server.vi ‏13 KB
Client.vi ‏13 KB

What programming resources exist for doing direct TCP/IP communication with the FP-1600 ethernet interface?

I am no stranger to IP communications (UDP or TCP), and I am attempting to build a project controlled by a Linux system. The FieldPoint 1600 looks interesting, but I can find no programming manual describing it's use.. only a dumbed-down 'user manual' describing how to use Windoze software. Is there any hard documentation on this device, or should I look elsewhere for my solution?

Nathaniel,
The FP-1600's use a National Instruments proprietary communications protocol. At this point in time, there are no plans to release the protocol. On the other hand, the protocol for the FP-1000/1001 serial network modules is published in the FP-1000/1001 Programmers Reference Manual and can be implemented on any platform.
If you are using LabVIEW, I have recently created a driver for the serial modules, that is multi-platform, that will be included in the next version of FieldPoint Explorer, but I will also be making it available for download independantly of FieldPoint Explorer.
Regards,
Aaron

TCP client communicating with UDP server

Hello,
I want to make a TCP client to communicate with an UDP server. Does anyone know a way of doing this? I am not interested in reliable data transfer. So I don't care if the datagram is lost. I want to make the UDP server accept some datagrams from the TCP client. Also, the datagram that I want to transmit is less than 65,536 octets so it is not devided to several datagrams. Therefore, only one exchange procedure occurs.
I made an UDP server using DatagramSocket and DatagramPacket classes and a TCP client using Socket class, but the TCP client informs me that the connection was refused.
Any ideas?

Let's google for IP header and the first hit is http://www.networksorcery.com/enp/protocol/ip.htm (Whoa! Classic page! I must have seen that back when googling was called altavista.)
There is a header field, a single byte, called protocol. For TCP/IP that field contains 6, for UDP/IP it contains 17.
If you send a packet with protocol=17, the receiving host's kernel will check if it has an process listening to UDP (17) at the port specified in the packet header. No such process? Then simply discard the packet. So you can't send an UDP packet to a TCP socket because the protocol field is wrong.
If you want to fake a TCP stream you could look into jpcap, which allows you to capture and send raw packets. Google for it; and pick the right jpcap, there are two, only one of which (AFAIK) can send packets. Attempting to write your own TCP implementation is highly advanced though, and not really practical.

Problems communicating with device over TCP/IP

Greetings,
In designing a GUI for a device with both RS-232 and TCP/IP communications capability, I've run into quite a puzzling issue that has me stumped and my brain in pain. You can query and send commands to this device using ASCII commands. Developing the serial port communications aspect of the GUI was trivial. My problem with TCP/IP is this:
I first establish the TCP connection using the "TCP open" vi. I then send my ASCII command or query (that is CR terminated) using "TCP write," pause for 250 ms, and then read using, "TCP read" in the CRLF mode (the device does respond with CRLF line termination). Success using this method in LV is intermittent, especially when I put the write/read vi in a loop and go between querying and sending commands-only. As a matter of fact, if I am only querying the device, it will run indefinitely without any problems and my front panel indicators display values from the read buffer. As soon as I send a command (to change a setting, for example), an error is propagated and the GUI no longer receives the data from the read buffer. More recently, I've found out that the device is definitely receiving the commands even when the GUI fails to retrieve the read buffer, because I can send a query, switch over to hyperterminal, and hit return... it displays my response in HT without my even having to type in a command! I'm totally stumped here, as I've played around with all kinds of delays in different places, different read modes, opening/closing connections, etc. I even tried putting in a redunant "dummy" read by itself, and a dummy read following a write with just a CR as the command (I thought this might solve my problem based on the behavior I saw when switching over to hyperterminal).
I've been searching the discussions for similar problems, but to no avail. I have read that TCP communications is handled by the OS, so perhaps this is where I am running into trouble? Any help, advice or suggestions are greatly appreciated.
(A little bit more information on the device: The way I want the device to work is as a monitor, so it should be querying indefinitely unless the user sends a command to update a setting, at which point it would send the command and then resume monitor status).

Hello CryoGuy,
Thanks for the question.
Your description seems to fit this KB about poor performance in TCP read. If this document isn't helpful, please let us know the following:
1. Which OS are you using?
2. Which version of LabVIEW are you using?
3. What's the specific error number and message you're getting?
4. At which function in LabVIEW are you seeing this error? (Turn on highlight execution to see where the error starts if the message doesn't say.)
Thanks,
Lisa
Applications Engineer
National Instruments

Teststand best practices architecture for communicating with TCP instruments

Hi,
I am using Teststand 2014 and LabVIEW 2013 SP1 as the module adapter.
My Teststand sequence file includes communication with 3-5 different instruments via TCP/IP.
Such as Spectrum analyzer, generator and other RF measurement devices.
There are many steps located in subsequences that implement code to communicated with these devices whether to fetch , query or write.
What is the best architecture to implement this program ?
As I can see it there are many possibilities, such as :
1. Launching a subsequence as a new thread in the Sequence Setup. This subsequence calls a VI that dynamically register for events/queue that can be launched from any step. (in this case there is a VI running in the background that can perform Write/Read/Qurey to the instrument and he is triggered from any step using an event or dequeue element)
This option can be duplicated for any instrument or only once for all of the instrument with prioritizing the event queue.
2. Creating a communication reference in the Setup of the Main Sequence. And passing it to any step that need it. (there is also the question how to pass this reference… in Teststand globals or in LabVIEW queue).
another 2 small questions that I encountered -
Is using LabVIEW queues and notifiers in TS steps and obtaining their reference (in the LabVIEW code) by name is considered best practices ?
If I would like to run only one VI in a new thread, should I use a new subsequnce and set it as a new thread or use the Run VI Asynchronously ? what are the differences ?

I use Action Engines to hold my VISA Sessions and just write my LabVIEW VIs to use those to send commands and read data. Any returned data can be analyzed in the VI or passed on to TestStand as a step result. You just need a sequence to run at start up to initialize your Action Engines and another one to close them.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

NI VBAI TCP Communication With Staubli CS8 Controller

I have a Staubli CS8 controller running the VAL3 programming language. Their documentation is light but I managed to brute force the solution to controlling DIO (Digital Input/Output) commands. I am having trouble brute forcing the SIO (Serial Input/Output) commands. The Staubli appears to only be capable of being the TCP/IP communication Master. I have my laptop's IP address configured in the Staubli controller with the ethernet socket name of "test". With the NI VBAI TCP/IP communication manager set up as slave and the TCP server enabled, the Staubli controller claims it is actively communicating with the NI VBAI socket server, and status is OK. In the VAL3 programming language I believe I have correctly linked the sioLink(siotest,io:test) between the variable name and the actual hardware device port. I try to send serial text strings from the CS8 to the VBAI. But I cannot figure out where to observe the serial communication traffic in VBAI. I have it set up right now to run infinitely and check the TCP port for serial input, but don't see any results. Anyone integrate these two systems yet? I have been using both for quite some time so I'll catch on fast if someone can run me through some quick steps if they have done this before with NI and Staubli. Thanks.

Actually the VBAI side of the communication was easy and straighforward. Plenty of help files and info on the NI support site. The Staubli side was more complex with minimal information supplied in the programming manual, and I was having trouble with that. After experimenting further I was able to transfer data between VBAI and the CS8 controller. If anyone else ever tries this here is what you need to on the Staubli side of the communication:
Set up the ethernet socket on the teach pendant:
Create a new socket and call it VBAI (or anything you really want)
Set the Staubli up as the TCP communication SERVER
Set the termination character for " ; " which is Staubli ASCII character 59 (default is ASCII character 13 which I could not generate in VBAI)
Create the Staubli program (VAL3 language ONLY):
Create a new program in your application
You need to create a serial input output variable (In the data sheet add a new SIO variable, call it sioASCII or whatever you want)
Also create a string variable (In data sheet add a new STRING variable, call it sTEXT or whatever)
Now you must link this variable to the actual hardware socket
Then read the socket and output the value to the teach pendant display screen like this:
UserPage ()
CLS ()
sioLink ( sioASCII , io:VBAI)
sTEXT = sioASCII
putLn ( sTEXT )
Run your VB Inspection on infinite loop first, then run the Staubli program and the inspection data will be displayed on the CS8 teachpendant. Yeah, it always looks to easy after you figure it out the hard way.

Communication with database using TCP sockets connection

Hi all,
I am bit of a newbie when it comes to databases. In a project I realised over te passed few weeks, I communicated with an 11g database using an application I created with VS Express. It uses an ODBC connection. I now want to connect a PLC to the same database. These PLC's don't have the ability to install an ODBC client so I need something different.
I am easily able to open a TCP socket on the PLC and send data from there. I would like to know if I can start a TCP sockets connection with our 11g server and send all queries directly. The other (already suggested) option would be to have the PLC connect to a PC that reads this information and hands it over to the ODBC connector, but that would mean I need an extra PC just to 'translate'.
I have been searching these forums for socket, TCP and more and feel it is possible, but I need a good document as a reference to show/tell me how it's done.
Thanks in advance,
Marijn

The TCP/IP interface to Oracle is undocumented (and hugely complex anyway). You'll need to use a higher layer iterface or setup your own infrastructure.
We need more information about what is available to you inside the PLC.
Can you use Java? If so, perhaps use thin JDBC?
Can you sent HTTP requests? If so you could set up your own Web services to handle this.
If you can only use C or C++, Oracle has interfaces there too.. it's called OCI (Oracle Call Interface) and thats as close to the networking layer as you can get.
Finally if you can use .NET Oracle has a Fully Managed Oracle Data Provider for .NET that you could use.
But if all you can do is super low level network access and none of the above then you will need to set up an intermediary as you mentioned.

Event ID: 5014, 5004 The DFS Replication Service is stopping communication with partner / Error 1726 (The remote procedure call failed.)

I'm replicating between two servers in two sites (Server A - Server 2012 R2 STD, Server B - Server 2008 R2) over a VPN (Sonicwall Firewall). Though the initial replication seems to be
happening it is very slow (the folder in question is less than 3GB). I'm seeing these in the event viewer every few minutes:
The DFS Replication service is stopping communication with partner PPIFTC for replication group FTC due to an error. The service will retry the connection periodically.
Additional Information:
Error: 1726 (The remote procedure call failed.)
and then....
The DFS Replication service successfully established an inbound connection with partner PPIFTC for replication group FTC.
Here are all my troubleshooting steps (keep in mind that our VPN is going through a SonicWall <--I increased the TCP timeout to 24 hours):
-Increased TCP Timeout to 24 hours
-Added the following values on both sending and receiving members and rebooted server
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
Value =DisableTaskOffload
Type = DWORD
Data = 1
Value =EnableTCPChimney
Type = DWORD
Data = 0
Value =EnableTCPA
Type = DWORD
Data = 0
Value =EnableRSS
Type = DWORD
Data = 0
---------------------------------more troubleshooting--------------------------
-Disabled AntiVirus on both members
-Made sure DFSR TCP ports 135 & 5722 are open
-Installed all hotfixes for 2008 R2 (http://support.microsoft.com/kb/968429) and rebooted
-Ran NETSTAT –ANOBP TCP and the DFS executable results are listed below:
Sending Member:
[DFSRs.exe]
TCP    10.x.x.x:53            0.0.0.0:0
LISTENING       1692
[DFSRs.exe]
TCP    10.x.x.x:54669
10.x.x.x:5722          TIME_WAIT       0
TCP    10.x.x.x:54673
10.x.x.x:5722          ESTABLISHED     1656
[DFSRs.exe]
TCP    10.x.x.x:64773
10.x.x.x:389           ESTABLISHED     1692
[DFSRs.exe]
TCP    10.x.x.x:64787
10.x.x.x:389           ESTABLISHED     1656
[DFSRs.exe]
TCP    10.x.x.x:64795
10.x.x.x:389           ESTABLISHED     2104
Receiving Member:
[DFSRs.exe]
TCP    10.x.x.x:56683
10.x.x.x:389           ESTABLISHED     7472
[DFSRs.exe]
TCP    10.x.x.x:57625
10.x.x.x:54886         ESTABLISHED     2808
[DFSRs.exe]
TCP    10.x.x.x:61759
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61760
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61763
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61764
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61770
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61771
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61774
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61775
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61776
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61777
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61778
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61779
10.x.x.x:57625         TIME_WAIT       0
TCP    10.x.x.x:61784
10.x.x.x:52757         ESTABLISHED     7472
[DFSRs.exe]
TCP    10.x.x.x:63661
10.x.x.x:63781         ESTABLISHED     4880
------------------------------more troubleshooting--------------------------
-Increased Staging to 32GB
-Opened the ADSIedit.msc console to verify the "Authenticated Users" is set with the default READ permission on the following object:
a. The computer object of the DFS server
b. The DFSR-LocalSettings object under the DFS server computer object
-Ran
ping <var>10.x.x.x</var> -f -l 1472 and got replies back from both servers
-AD replication is successful on all partners
-Nslookup is working so DNS is working
-Updated NIC drivers on both servers
- I ran the following to set the Primary Member:
dfsradmin Membership Set /RGName:<replication group name> /RFName:<replicated folder name> /MemName:<primary member> /IsPrimary:True
Then Dfsrdiag Pollad /Member:<member name>
I'm seeing these errors in the dfsr logs:
20141014 19:28:17.746 9116 SRTR   957 [WARN] SERVER_EstablishSession Failed to establish a replicated folder session. connId:{45C8C309-4EDD-459A-A0BB-4C5FACD97D44} csId:{7AC7917F-F96F-411B-A4D8-6BB303B3C813}
Error:
+ [Error:9051(0x235b) UpstreamTransport::EstablishSession upstreamtransport.cpp:808 9116 C The content set is not ready]
+ [Error:9051(0x235b) OutConnection::EstablishSession outconnection.cpp:532 9116 C The content set is not ready]
+ [Error:9051(0x235b) OutConnection::EstablishSession outconnection.cpp:471 9116 C The content set is not ready]
---------------------------------------more troubleshooting-----------------------------
I've done a lot of research on the Internet and most of it is pointing to the same stuff I've tried. Does anyone have any other suggestions? Maybe I need to look somewhere
else on the server side or firewall side?
I tried replicating from a 2012 R2 server to another 2012 server and am getting the same events in the event log so maybe it's not a server issue.
Some other things I'm wondering:
-Could it be the speed of the NICs? Server A is a 2012 Server that has Hyper-V installed. NIC teaming was initially setup and since Hyper-V is installed the NIC is a "vEthernet
(Microsoft Network Adapter Multiplexor Driver Virtual Switch) running at a speed of 10.0Gbps whereas Server B is running a single NIC at 1.0Gbps
-Could occasional ping timeout's cause the issue? From time to time I get a timeout but it's not as often as the events I'm seeing. I'm getting 53ms pings. The folder
is only 3 GB so it shouldn't take that long to replicate but it's been days. The schedule I have set for replication is mostly all day except for our backup times which start at 11pm-5am. Throughout the rest of the time I have it set anywhere from
4Mbps to 64 Kbps. Server A is on a 5mb circuit and Server B is on a 10mb circuit.

I'm seeing the same errors, all servers are running 2008 R2 x64. Across multiple sites, VPN is steady and reliably.
185 events from 12:28:21 to 12:49:25
Events are for all five servers (one per office, five total offices, no two in the same city, across three states).
Events are not limited to one replication group. I have quite a few replication groups, so I don't know for sure but I'm running under the reasonable assumption that none are spared.
Reminder from original post (and also, yes, same for me), the error is: Error: 1726 (The remote procedure call failed.)
Some way to figure out what code triggers an Event ID 5014, and what code therein specifies an Error 1726, would extremely helpful. Trying random command line/registry changes on live servers is exceptionally unappealing.
Side note, 1726 is referenced here:
https://support.microsoft.com/kb/976442?wa=wsignin1.0
But it says, "This RPC connection problem may be caused by an unstable WAN connection." I don't believe this is the case for my system.
It also says...
For most RPC connection problems, the DFS Replication service will try to obtain the files again without logging a warning or an error in the DFS Replication log. You can capture the network trace to determine whether the cause of the problem is at the network
layer. To examine the TCP ports that the DFS Replication service is using on replication partners, run the following command in a
Command Prompt window:
NETSTAT –ANOBP TCP
This returns all open TCP connections. The connections in question are "DFSRs.exe", which the command won't let you filter for.
Instead, I used the NETSTAT command as advertised, dumping output to info.txt:
NETSTAT -ANOBP TCP >> X:\info.txt
Then I opened Excel and manually opened the .TXT for the open wizard. I chose fixed-width fields based on the first row for each result, and then added a column:
=IF(A3="Can not", "Can not obtain ownership information", IF(LEFT(A3,1) = "[", A3&B3&C3, ""))
Dragging this down through the entire file let me see that row (Row F) as the file name. Some anomalies were present but none impacted DFSrs.exe results.
Finally, you can sort/filter (I sorted because I like being able to see everything, should I choose to) to get just the results you need, with the partial rows removed from the result set, or bumped to the end.
My server had 125 connections open.
That is a staggering number of connections to review, and I feel like I'm looking for a needle in a haystack.
I'll see if I can find anything useful out, but a better solution would be most wonderful.

TCP\IP Communication in the XI

Hello,
We have a scenario in which we have to communicate with a 3rd party system from our ECC system using the tcp\ip protocol. We used the XI by building a BPM with a transformation step that uses a java class, in which we opened a socket connection and sent and received our messages, as described in the weblog .<a href="/people/saravanakumar.kuppusamy2/blog/2005/12/15/socket-integration-with-xi:///people/saravanakumar.kuppusamy2/blog/2005/12/15/socket-integration-with-xi
The main problem we encountered is that we have to maintain a continuous connection to the 3rd party system, and we can't find a way to make this possible using the XI (it keeps stateless beans for the transformation steps, therefore closing the connection when the class run ends).
Is there a way to maintain a continuous connection of tcp\ip from the XI? Maybe by using an adapter?
Thanks in advance,
Tal.

I used the transformation class to call a custom web service that keeps the connection open and handles all tcp/ip communication.

CVI RT (Real Time) - HOST TCP/IP Communication

Hi,
I am using CVI 2012 Real Time with PXI hardware. I am using TCP/IP communication b/n RT and Host. RT is server and Host is client. In my application, after TCP connection is established between client and server, client will send a command , take for example "GET_DATA" to RT, RT has to respond to that by sending that data.
I am successful in
Establishing RT-Host TCP communication ( I am able to see that host is reading the welcome message sent by RT).
Host is sending the command "GET_DATA" to RT.
RT is receiving the "GET_DATA" command from Host.
In TCP server call back function, in TCP_DATAREADY event, i am using ServerTCPRead() to read data from Host. After reading the data, i am comparing the data with expected command and based on that i will be sending the data using ServerTCPWrite().
RT is reading the command from Host, but it is not writing the data to client. I am not sure whether I can use ServerTCPWrite() in TCP Server call back function.
I also tried using multithreaded concept, but not getting success.
Please suggest any solution for this.
Thanks,
Haari

Hey Rashid,
Check out this tutorial with examples and let me know if it helps.
Stephanie O.
DIAdem Product Manager
National Instruments

TCP/IP communication with Matlab

Similar Messages

Maybe you are looking for