.NET assembly with MathScript Node

[p.pitrelli]

Dear Community, I'm trying to build a .NET assembly with Labview 2015 32 bit containing a MathScript Node with a call on a Matlab function and I get a really strange behaviour.

What happens is that if I build the assembly and I try to call his function in a Labview VI I get the error 1172 (as shown in the figure) but if I build the same VI that gets the error as an executable it works perfectly. Moreover, if I remove from the MathScript Node the Matlab function called "sub" (row 😎 the assembly works also when is called by the VI.

The problem seems to be related to the Matlab function but why it happens only when I execute the VI and not if I run the executable?

Thank you all in advance if someone has an idea.

[alamanna]

Hi Paolo,

I just noticed that the MATLAB function called sub is not supported by MathScript, so I can't see the purpose of keeping it in the code.

Searching for your error message I found these documents:

• LabVIEW and .NET Exceptions
• Error 1172 When Building .Net Interop Assembly
• Error -1172 From .NET DLL When Running a LabVIEW Executable

Even if they don't exactly relate to your problem, maybe they could help to find an explanation of this strange behavior, if you care about it.

Regards,

Alessia

[p.pitrelli]

Hi Alessia,

thank you for your feedback. The function called sub is not a Matlab function but a function that I create in Matlab, sorry if didn't explain properly; it's a simple .m file that returns the first value of a vector ( a=a(1) ). The strande thing is that the VI that calls this function works, when I create an assembly from that VI if call this from an other VI it returns the error but if I compile the latter VI as an excutable it back to work.

It's annoying because I can't run the software I'm working on in Labview Environment but I have to build this as exe :(.

Thank you for the documentation, I'll take a look on it.

Paolo

[alamanna]

Hi Paolo,

thank you for the clarification, I'm sorry for the misunderstanding. Could you please share the code of the sub function? I guess we might find there the key to explain and solve the issue.

Regards,

Alessia

[p.pitrelli]

Hi Alessia,

the code is:

function b=sub(a)

b=double(a(1,1));

Often happens that when the Mathscript calls external DLLs doesn't recognize the variable type and, for example, a double can be assigned as a matrix of double. I use this function to simply redefine the variable type as a double.

Paolo