Why do I have an error trying to build the code while the models have the same config

Hello,

I am using the Simulink 2018 'build model' feature but it doesnt work. there is an error saying that the reference model doesnt have the same compiler as the calling model

See snapshot attached.

The models have excatly the same configuration set

Could you let me know all the things I need to check in the model configuration to try to solve this bug.

MAny thanks in advance for your help.

Gregoire