nidmm.cs and niswitch.cs disposal

[dbro]

Hi,

I have encountered a problem using the DMM and Switch .NET classes -- my application crashes on close even though all of my variables seem to be disposed properly (stepping through the classes shows that the Dispose method is getting called).

This only happens if we initialize the switch/DMM (e.g. myDMM = new InstrumentDriverInterop.Ivi.niDMM(dmmName, true, true);),

Has anyone seen this behavior before and/or have any ideas on how to force a disposal of those objects? Thanks.

[DavidMN]

Hi dbro,

It's possible that this is an issue with the driver, and not calling niDMM_close().  Which DMM device are you using?  This thread may shed some light.

David

Applications Engineer

National Instruments

[EWTech]

What do load cells have to do with this?

[dbro]

After doing some more digging, I believe the problem is a bug in an earlier version of the DAQmx library...with the application running on a PC with a newer DAQmx, the problem went away.