Instacal keeps losing my board information

I am using Meilhaus Elec software to set up and calibrate four boards that i am using to log data and control eqipment via a labview programm i have written. However, after i have set up the four boards (2x USB-TC, 1x USB-3104 and 1xUSB-1208F) using Instacal and then run the labview programme, the programme only runs for a few seconds then crashes. After the crash when I go back to Instacal some of the boards are missing or the board numbers have changed. Theni have to re-start the PC otherwise Instacal can no longer find the boards.
I have the four boards routed through a USB hub and then taking a single USB connection back to the PC. The PC is a HP with 2 GB RAM and a dual-core processor and when I run the labview programme without the boards attached it works fine.
Do you know of a reason why Instacal keeps losing the board information and connections?  Or is there some known conflict when using it with Labview that could explain the problems I am experiencing.
Any suggestions will be appreciated.
Regards
Trevor Morgan (Imperial College London).
Solved!
Go to Solution.

It is possible to post your code? What did you mean by the program crashes?  Did  you received the error code “1-  Invalid board number” (ErrHdlng.VI from MCC)?   I have a LabVIEW program with four MCC boards: a USB-TC, a USB-3103, a USB-SSR24 and a USB-ERB24.  When I used a USB-HUB, sometime I lost the communication with a board, but after hours not after few seconds (I removed the USB-HUB).  Without the HUB the program runs for days.
Jean-Marc
Jean-Marc
LV2009 and LV2013
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