NI_daq version 4.3 DAQ_Op() return -70. What does it mean?

[jill 339]

The software was developed with LabWindows 2.2 library. The card is AT-MIO-16.
When the system starts from power on, it works for a while but than the error -70 occurs. Once it occurs, i have to power down the whole system to get it work again.

[David Mc]

Jill,

This is an older unsupported version of the NI-DAQ software, but I believe the error -70 is a timeout error.

David McClelland
National Instruments

[jill 339]

Thank you David! It is a very old version that is for LabWindows 2.2.
The application was developed using quick C. Now it seems that if all modules except the main file are put into an lib file and then link the lib to create an exe, error "-70" will not occur. But if all c files are compiled to obj and than individule obj files are linked to an exe, the "-70" error will guarentee to happen.
I know this question is beyond ni's product and the old stuffs are no longer supported. I just hope that somebody may have similar experience and would like to share an easy answer.