Hello all

I have some components that work well in simple models, but when they are linked in a more complex model, this error appears:
"Error: Internal error ./Compiler/BackEnd/BackendDAETransform.mo: function findDiscreteEquation failed
Your model contains a mixed system involving algorithms or other complex-equations.
Sorry. Currently are supported only mixed system involving simple equations and boolean variables.
Try to break the loop by using the pre operator."

What does it mean?

Edit:
In addition, I have changed the system so that there are no Integer variables, but the result is the same.
I am using latest nightly build