NI-488: Command Requires GPIB controller to be controller in charge

[ljark]

I am getting this error when trying to communicate to a designed Telnet device.  using TCP/IP Open and close commands.  The system does not even have a GPIB controller in it.  It may be internal to the product we are testing, since the unit passes the 2nd time through.  But all I am doing is opening a TCP/IP connection 192.168.168.168 port 50101 sending command to GET MEAS and reading back a string, then close the TCP/IP.  Pretty simple.  It doesn't open the port and gives the GPIB 01 error.  Could it be the VISA controller causing this? 

It errors out when it gets to TCP/IP open.vi

Thanks

ljark

[Dennis_Knutson]

Read the error message more carefully. There are two possible reasons for error 1. Since you are not using GPIB, you should consider the other possible reason:

 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 @.