Simulink error: All inputs must be constant.

Hey,

I receive the following error message when trying to run the Simulink model.

All inputs must be constant.

P-code function 'p_file.p' produced an error.

Code of the Matlab Function Block:

function y = fcn(m,n)

y = p_file(m,n)

I can run p_file(1,12) from workspace without any problem.

Thank you for any suggestions!

[Walter Roberson]

If you call

y = p_file(1,12);

in the Function Block, then does that work?

[wkm42]

Yes it does. I wonder why i didn't try it that way... Somehow n has to be defined in the Function block and not by a constant block. But it's alright, because only m will change anyway. Thanks for you help!

[wkm42]

Okay, im still confused why

y = p_file(1,12);

works, but

global n
y = p_file(1,n);

or n as constant block doesn't..

[Walter Roberson]

Sorry, I do not know about that.

Does the p_file use the signal processing toolbox?

http://www.mathworks.com/help/simulink/ug/functions-supported-for-code-generation--alphabetical-list.html

[wkm42]

Probably it does, but i don't know it for sure, cause i don't have the .m file. It's some kind of filter.