Issues initializing high speed digitizer card

[Brumfield137]

I recently built a new computer for data acquisition.  I didn't have any issues taking a data acquisition program for a high speed digitizer written in LabWindows 8.5 and running it successfully with LabWindows 9.0 on the new machine.  The only issue I encountered was naming the high speed digitizer card in MAX the appropriate resource name expected by the data acquisition program.  Everything ran fine for 4 days.  Today I attempt to run the same program and cannot get it to run.  Debugging the code shows that the device fails to initialize when niScope_init() is called.  

In MAX the digitizer card passes a self-test, and I can call up test panels and see a signal input.  I checked the device name to ensure that it matches the resource named expected in the program.  I also reset the device in MAX and then tried to run the acquisition program.  None of these attempts has succeeded.

I can't really find anything that has changed between the last time I ran the program and today.  Has anybody run up against this issue in the past, and is there a solution or suggested further troubleshooting? 

[Brumfield137]

Did error checking with a ni Scope error handling function.  The error number returned is -1074134994.  I cannot get the function to write to a char array describing what this error number actually means.  

[ebalci]

The error code translates to this error message: "Initialization failed in driver DLL".

I used the function niScope_error_message to find out.

Did you try running the NI-Spy while operating the test panels?

NI-Spy can be configured to capture NI-SCOPE library calls, from which you can see how MAX is initialising the card successfully.

Hope this helps, 

[Brumfield137 · Accepted solution]

This issue was solved by re-installing the drivers for our high speed digitizer.  I still have no idea why after four days something happened to the original driver installation.