MATLAB: INTERNAL ERROR. Failed assertion in sfdb_breakpoints.c at line 35: (script->bm.breakpoints).length>(unsigned int)(lineNumber-1)

internal errorsfdb_breakpoints.csimsimulink

INTERNAL ERROR. Failed assertion in sfdb_breakpoints.c at line 35: (script->bm.breakpoints).length>(unsigned int)(lineNumber-1)

Has anybody seen this error before? I was using the MATLAB function "sim" to run the simulink model and got this error. Now when I try to run the simulink model independently, I get this error (whereas before trying to run it via MATLAB, it ran fine).

Any suggestions?

Candice

Best Answer

I ran into this error as well (I'm running 2012b 64 bit).

It went away when I restarted Matlab. That's the only solution I've been able to find.

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Assuming your breakpoints are sorted (I'll call them breakpoints), you could do something like this:

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The fact that the stack for the error includes the function parfinitedifferences suggests to me that the condition to enter that if statement is only satisfied on one of the workers used to evaluate the finite difference in parallel (you're passing the UseParallel option to fmincon, right?) In that case the breakpoint that was set on the client is not present on the workers.

You probably wouldn't want to enter debug mode on the workers anyway as they fall into the same general category as input and keyboard as called out on this documentation page. The worker would wait at the breakpoint for input that you couldn't give it.

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