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

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Cory
Cory 2025-2-27
编辑： praguna manvi 2025-4-15
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.

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回答（1 个）

praguna manvi
praguna manvi 2025-3-13
编辑：praguna manvi 2025-4-15
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.

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