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underspecified signal dimension from simulink model

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wilson tan
wilson tan 2019-1-16
编辑： Joe Jones 2022-7-26
Hi ,
i got this error code while trying to run the simulink model
Simulation
1
Clear
04:34 PM Elapsed: 0.365 sec
Compilation of model 'lab' failed while trying to resolve underspecified signal dimensions.
Suggested Actions
Enable 'warning' or 'error' diagnostics for the list of underspecified signal dimensions.Open
Caused by:
  • Error in default port dimensions function of S-function 'lab/Subsystem/MATLAB Function1'. This function does not fully set the dimensions of output port 2
Component:Simulink | Category:Block diagram error
the code for the fucntion 1 is as follows :
function [lam1 , lam2p]= magnetic (i1, i2p)
La=1/((1/Lm1)+(1/Ll1)+(1/Ll2p));
lamm=La+((lam1/Ll1)+ (lam2p/Ll2p));
i1 = (1/Ll1)*(lam1-lamm);
i2p = (1/lam2p) * (lam2p-lamm);
Lm1, Ll1, Ll1m Ll2p, lam1, lam2p are part of a previous user define function.
  1 个评论
Joe Jones
Joe Jones 2022-7-26
编辑：Joe Jones 2022-7-26
Dear
Have you solved this problem? I also have the same problem recently. If possible, please help me. Thank you!
@wilson tan

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回答（1 个）

Daro VAN
Daro VAN 2019-6-15
Hi!
Have you solved the problem? I have the same problem. I put the IC block before the function, the simulation doesnt show any error,but the divergence happened in my case. Maybe you can try to do so. Kindly Let's me know if you have found different approach.

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