Data dictionary addEntry "database is locked" error when running multiple instances

I get the following error when multiple instances of Matlab are simultaneously trying to generate and modify data dictionaries:

The database
/var/folders/mq/h/hrtcpj6jv1x@ybxkv6cj2h8888gq/T/data_model_repository3.4_R2023b_v1_*.stddc
is locked, or a table in the database is locked. (database is locked)

Is this a common file shared by multiple Matlab instances? If so is there a workaround to avoid this error?

Perhaps a noteworthy detail: I'm using a mac.

Answer 1

[praguna manvi]

Hi @Cory,

Refer to the following useful discussion thread on running Simulink on multiple MATLAB instances simultaneously:

https://www.mathworks.com/matlabcentral/answers/1728440-running-simulink-on-multiple-matlab-instances-concurrently-on-machine-crashes-in-sldd-dmr-sdi-jen

The workaround is to ensure unique "cache" and "codegen" folders using "Simulink.fileGenControl" and to also specify a temporary directory by setting the 'TMPDIR' environment variable.