Error while running FOCEI

Encountered the error message above when trying to fit a model using FOCEI algorithm. Not sure if the error is coming from the model specification or reading dataset. Could you please help troubleshoot? Thank you.

Please always share a complete example when posting. It makes it easier for us to debug. However, this looks like an issue with version 1.0.x of Pumas when modeling bioavailability with random effects in less than all compartments. The issue if fixed in version 1.1.0 that was released yesterday so it would be great if you could try it out and let us know if it resolves the issue.