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Dear community,
I tried to link Matlab and TRNSYS via Type 155 but failed with the error below.
The simulation initially proceeds without problems, but then an error occurs at a certain moment.
(The moment of error occurrence is different depending on the simulation start time)
Has anyone else had the same problem as me or has any idea how to solve it?
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*** Warning at time : 1248.000000
Generated by Unit : 33
Generated by Type : 155
TRNSYS Message 315 : The TRNSYS processor has reported a potential problem with the connections in your input file. In version 16, there is a very specific calling order after convergence has been reached at each timestep. One of your connections flows against this calling order - for example you may have the output of an integrator connected as an input to a standard component (one that is being called iteratively at each timestep). While this is not technically an ERROR - it may cause incorrect values to be passed to the component. For example, the input to an iterating component from an integrator will be from the previously converged timestep and not the current timestep. Refer to the TRNSYS Manual - Volume 1 - for more information on the calling order for TRNSYS components
Reported information : ** Reported by Exec.f90
*** Fatal Error at time : 1259.000000
Generated by Unit : 33
Generated by Type : 155
Message : The M-File has flagged an error. Returned value for 'mFileErrorCode': 400.0000000000000 . The error occurred at info(7) = 0 , info(13) = 1
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Thank you in advance,
@danalee The error would suggest that TRNSYS is sending a set of inputs to your *.m code that Matlab cannot solve. You might try adding a TRACE to your Type155 component. That will cause the input values that are being sent to Type155 to be written to your *.lst file. The data is a little hard to interpret (largely because there is a lot of it) but my hope is that you can isolate the set of inputs that is causing the error in Matlab then feed those into your Matlab code within the Matlab environment and see if you can find the problem.
kind regards,
David
danalee Topic starter
09/03/2025 3:07 am
@davidbradley Thank you very much for your comment. However, I am still a new user of TRNSYS so I did not fully understand your comment. If you could explain a little more about how to add TRACE, I would really appreciate it.
Best regards,
Dana
