Undefined function or variable 'optIdx'. Error in sh (line 28) dev = gpuDevice( optIdx )? what is this

if        dev = parallel.gpu.GPUDevice.select( optIdx );
  else
      dev = parallel.gpu.GPUDevice.current();
  end

    throw(E); % Strip off the stack.
end

[Walter Roberson]

That code appears incomplete. You cannot have a = inside an if statement.

Answer 1

[Joss Knight]

Sorry if this seems like a facetious answer - I may be missing the point. The error means you haven't defined the variable optIdx.

Ah, wait a minute, I'm just getting up to speed. You're displaying the contents of the function gpuDevice there aren't you? I'd have to know how you called gpuDevice to know how that went wrong.