FreeMASTERのトピックIssue with PipeWriteXxxArray ActiveX API

Issue with PipeWriteXxxArray ActiveX API

lucabarbiero — Thu, 01 Dec 2022 08:38:12 GMT

Hi,

I have as issue with using the PipeWriteXxxArray API functions, as I connect to the ActiveX server from MATLAB and I try to send arrays.

With scalar inputs it works:

But how should I provide an array? I tried with both MATLAB cell array:

And MATLAB normal array:

But nothing. Also tried row vs column array, and tried other PipeWriteFloatArray (same issue).

What is the right way?

Thanks,

Luca

Re: Issue with PipeWriteXxxArray ActiveX API

MichalH — Thu, 01 Dec 2022 08:54:23 GMT

Hello Luca,

I don't think anyone has tried to exercise Array passing from Matlab before. Can you quickly try to set:

feature('COM_SafeArraySingleDim', 1)

This should turn the Matlab arrays into a single-dimensional safearrays which the FreeMASTER expects.

If this does not help, we will help to debug the issue deeper.

Thanks,

Michal

Re: Issue with PipeWriteXxxArray ActiveX API

lucabarbiero — Thu, 01 Dec 2022 10:28:32 GMT

Hi Michal,

It's ok you know that as a user I like to pioneer features of this amazing tool.

After adding that command to my MATLAB script, I don't get the error anymore when invoking PipeWriteXxxArray from MATLAB.

However at target side, after calling FMSTR_PipeRead, the right amount of bytes is received, but only the first element of the array is received correctly, while further array elements contain corrupted data. I tried with PipeWriteUIntArray, PipeWriteFloatArray and with arrays of 2 and 5 elements.

I can do with just sending scalars for my current use case. Maybe take a note to look into this at some point in time.

Thanks for your quick response,

Luca

Re: Issue with PipeWriteXxxArray ActiveX API

MichalH — Fri, 02 Dec 2022 07:22:25 GMT

Yes, we will investigate and fix.

Thank you.
Michal