Why is Simulink Accelerator Regenerating Code?

I have a model which has variables stored in the model workspace.

I frequently assign new values to certain variables in the model workspace and the accelerator model is rebuilt.

Based on the process described in "Determining Why Simulink Accelerator Is Regenerating Code" I went through the following steps:

1. I run [cs1,csdet1]=Simulink.BlockDiagram.getChecksum(model); on the initial model
2. Assign new value to a variable
3. Run [cs2,csdet2]=Simulink.BlockDiagram.getChecksum(model); on the final model
4. Run checksum comparison, I get "Checksums are different"
5. Run the comparison to understand the sources of checksum differences, I get "Contents checksums are the same and Interface checksums are the same"

I've attached the outputs of the checksum comparison.

Any ideas?

Thanks,

Alex.