Port dimensions error out of nowhere

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Simon Detmer
Simon Detmer 2020-7-22
评论： Jesús Zambrano 2020-9-2
Hello,
so I've been using a .slx for a few weeks now, and today, without changing anything in the model, this error pops up:
Error in port widths or dimensions. 'Output Port 1' of 'Modell/Lageregelung/MATLAB Function' is a [3x3] matrix.
But the output is and has been a 3x1 vector.
Now if I insert a new Matlab function block with the following code
function FB = fcn(FL)
FB = FL;
which should just pass through the input, I get
Size mismatch (size [1 x 1] ~= size [3 x 1]).
For some reason Matlab expects FB to be 1x1, even though the size of FB is set to -1.
I have an older version of the .slx, and it works, even though I can't spot a difference anywhere.
I fixed the problem by setting the size of FB to 3 in the, but I would like to know what the issue is, since it cost me at least an hour of time.
  1 个评论
Jesús Zambrano
Jesús Zambrano 2020-9-2
If you include more details of what the Modell/Lageregelung/MATLAB Function is about and the screenshot of the model that function is placed, you might get help. Otherwise, it'll be difficult to detect the reason of that error message.

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