error in MFunction with "OutputArguments" larger than 19 [OSX+Mathematica10]

[sunt05]

I have a Matlab-based function PUCM that works well under Matlab 2012a. By default, PUCM under Matlab should have an output of size as 30.

The problem is: When I call PUCM with MFuntion["PUCM","OutputArguments"->20], the error occurs as follows: "MATLink::errx: Undefined function or variable 'ZrFXJhEdSqtsInkWOMpUYGLCwxgfvoHBDjTybmeVNAluKi'." However, once the "OutputArguments" is decreased to a number less than 20, say 18, everything works as fine as usual.

I'm wondering if there's any internal error with MATLink.

[szhorvat]

Using 30 output arguments sounds rather unusual. Is there any reason why you coulnd't just return the result in a single array or cell?

[sunt05]

In fact the Matlab function PUCM was designed to be re-utilized by other functions and the multiple-output convention will other functions' lives easier. Your suggest does sound a good workaround I will try. However, I'm still wondering why MATLink fails to retrieve multiple outputs by an MFunction.

[szhorvat]

Actually I was not able to reproduce this problem when I tried with 21 output arguments. Please give a complete minimal example that shows the problem and also append the output of MATLinkDeveloperGetInfo[].

[szhorvat]

In[12]:= myfun = MFunction["myfun",
  "function [a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 a16 a17 a18 a19 a20 a21] = myfun(x)
  a1=x
  a2=x
  a3=x
  a4=x
  a5=x
  a6=x
  a7=x
  a8=x
  a9=x
  a10=x
  a11=x
  a12=x
  a13=x
  a14=x
  a15=x
  a16=x
  a17=x
  a18=x
  a19=x
  a20=x
  a21=x
  end", "OutputArguments" -> 21, "Overwrite" -> True] 

Out[12]= MFunction["myfun", "OutputArguments" -> 21]

In[13]:= myfun[3]
Out[13]= {3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3., 3.}

In[14]:= Length[%]
Out[14]= 21

[szhorvat]

Closing as un-reproducible. If you have a reproducible minimal example, please post it.