I can't be the first to ask this question... Giga-tronics 8888A - USB ?

[Rohama_K]

What problem are you running into specifically? I don't have that device, so I'm not sure how I would go about to test this.

[AuburnAlum]

Hi - 

Well- the good news is that the error I have is independent of whether the instrument is connected or not- it is strictly regarding loading and finding all the functions within the DLL.

Here is the description:  I am programming the NI functions LoadExternalModule & GetExternalModuleAddr to load the DLL and then to get a pointer to a function in the DLL.  

The call to LoadExternalModule (pathname) was successful and returned an integer ID of the DLL.

The call to GetExternalModuleAddr (module_id, funname, &status) fails with a retun of NULL - it is unable to find the function "GTPM_GetAddress" within the DLL (function description is on page 7 of giga-tronics programming manual)

I suspect the format of the DLL is incompatible with Labwindows, or possibly labwindows is looking for some prepend or postpend.  But Irealy don't have a clue.

Thanks for the help.

[ebalci]

Is there any reason why you dont use static linking?

Your initial problems are solved, I suppose?

[AuburnAlum]

statisc linnking also fails. 

I used the two step programatic approach to help me debug the problem- to find out if it is due to bad file path, or bad DLL.

my original problem is not solved, I still cannot access the functions within the giga-tronics DLL.  I know it is not a problem with NI, butstill hoping someone else has experienced similart problems and knows how to build a work-around.