Error 32812 (Specified Tag Name not Defined) from FP Read

[jmburns]

I built an application using LabVIEW 7.1 and FieldPoint 4.1.  It performed well until about a week ago.  Suddenly, I started getting error 32812 (Specified Tag Name Not Defined) when doing an FP Read to read all the channels on an FP-RLY-420.  This is installed at a client's site, but my client assures me that nothing changed in the computer configuration.  There is a dual serial card installed (SIIG Cyberserial DualPCI dual 16550 RS232 Serial I/O Card), which does seem to cause problems (mouse jumps erratically), and I wonder if this card could be contributing to the problem, but I'm not sure why I would get the specific error message I'm getting.

In looking for info on the problem, I did find an article on registering the MIS files, but I have tried selecting "Find Devices" through MAX while logged on as an admin, and the error still occurs.

If anyone has any ideas as to what could be causing the problem, it would be greatly appreciated.

Thank you,
Jason

[Travis G.]

Hello Jason,

I think that the error you are seeing could be caused by either 1) a mismatch between the tag names saved on your computer and the actual channel names on the module, or 2) a problem with how the serial port is communicating with the module (only applies if you are using a serial communication module, as opposed to an Ethernet module).  For the first issue, you have already tried to reconcile any differences in tag names by reregistering the MIS files.  Since that didn't work, I would recommend trying to recreate your entire FieldPoint system in Measurement & Automation Explorer (MAX), including the IAK file.  I know it is kind of extreme, but I would recommend just deleting your FieldPoint configuration in MAX, deleting the IAK file, and resetting the address and recreating your configuration. 

I think that troubleshooting a serial communication problem could be a little more difficult.  I would recommend browsing through the following documents for some possible troubleshooting ideas.

FieldPoint Serial Network Module Common Problems

Let us know if this solves the problem or if you have any further question.

Regards,
Travis Gorkin
Applications Engineering
National Instruments
www.ni.com/support