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I have been using TRNSYS with Matlab2022a for sometime without issues. I downloaded the new version Matlab2024a and I am unable to start the Matlab engine. Is it possible to specify to TRNSYS to use the Matlab2022a version?
The reason that Matlab2024 is not working may be that the version of the Type155.dll file located in your .\TrnsysXX\Exe\ directory has to match your Matlab version. DLLs for various Matlab releases are located in the ..\TrnsysXX\Exe\DLLs\ directory. If you find your version of Matlab there, extract the Type155.dll and place it in ..\TrnsysXX\Exe, replacing the file that is already in that location. If you do not see your version of Matlab in the ..\TrnsysXX\Exe\DLLs\ directory please contact your distributor; they can provide you with an appropriate version of the file. We do not yet have a dll for Matlab2024a but if you can please send an email to techsupport@tess-inc.com, I can get some files from you and create one.
I am uncertain as to whether it is possible to get Trnsys to communicate with Matlab if there are two Matlab versions installed. One of the steps involved in setting up the communication is to add the path to libeng.dll (normally located in C:\Matlab\bin\win64) to your Windows search path (assuming you installed in C:\Matlab) and I imagine that if you had both c:\Matlab2022 and c:\Matlab2024 then you could simply add the appropriate directory to the search path. Having references to both versions of Matlab in the search path is very likely to cause problems.
As a side note (and for others searching archived threads) the Type155 section of the 05-MathematicalReference.pdf manual contains the most up-to-date knowledge base about connecting Trnsys and Matlab to one another.
kind regards,
David
