Parfor fails but for doesn't?

hi all,

If I use the code: 

scalar_matrix=sptensor([nPoints-kernel_length nInput_kernels nNodes]);

for j=1:(nPoints-kernel_length),

      a=input_kernel_matrix*(output(:,j:kernel_length+j-1).');
      if nnz(a)==0
          scalar_matrix(j,:,:)=sptensor([nInput_kernels nNodes]);
      else
          scalar_matrix(j,:,:)=sptensor(a);
      end;
      if mod(j,10000)==0
          display(j);
      end;

end;

Then everything works fine. However, if I replace the for with parfor it crashes. The code seems fine for parellization to me. Any idea why? I use the tensor toolbox (external toolbox).

[Jan]

Does "crashes" mean, that MATLAB stops with an error message? Then posting this message would make an answer much easier.

[Eli]

Hi Jan,

Thanks. Yes, it does. Here is the message:

"

??? Error using ==> parallel_function at 598

Error in ==> subsasgn at 86

Attempt to reference field of non-structure array.

Error in ==> build_scalar_matrix_sparse at 7

parfor j=1:(nPoints-kernel_length),

"

[Walter Roberson]

Odd odd.

Ummm, try

which -all parfor

just in case you have a parfor.m on your path that isn't the right one.

Also, try removing the comma at the end of the "for" line: it is not needed and might be causing problems perhaps.

[Konrad Malkowski]

Can you post a more complete example of your code? It would be especially helpful if you could post a snipped of code that initializes all the input variables to values representative of your application.