Problem with TCP/IP communicat​ion: error ni-448 when I want to write on a TCP/IP-con​nection

Hi folks
I have a really annoying problem: I want a computer (Win XP, Ethernet board, Labview 7.1) to communicate with my robot controller (Win 2k, Epson SPEL+ language). The robot controller is the client, the LabViewPC the server. now reading messages sent by the robot controller are no problem to read. But when I want to send messages from the LabViewPC to the robot controller I get an error message: error ni-448, make sure that the GBIP-controller is the primary controller.
For the communication I open a TCP-listener and a TCP wait listener in a while loop. So far this works. Then I use the TCP-write function to send a string to the robot controller. Here the error described above occurs. So the communication doesn´t work.
Can anybody help me?
Please. Thank you in advance!

hi there,
are there several network adapters on your host? if so pass the IP of the network adapter to the "TCP listen.vi". i'm not sure but i think i remember that in former versions this had no effect. then you could use "TCP Listen.vi" on your slave and "TCP Open Connection" function on your host.
you can use the "Simple Data Server" and "Simple Data Client" examples for a quick test.
Best regards
chris
CL(A)Dly bending G-Force with LabVIEW
famous last words: "oh my god, it is full of stars!"

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