Make sure that attribute algorithms do not contain recursions.

For a quick testing call the function Show variable dependencies in the table docking window. Unilateral dependency is Ok. This is signalized by a single arrow. Recursive dependencies are errors. These are signalized by a left right arrow. Errors are displayed both in the message docking window and later when testing in the dialog box QA check.

The following exemplary figure shows simple dependency between A and B.

Equation: A = B

Simple dependency -> OK

The following exemplary figure shows recursive dependency. The Variable Manager shows A=B and B=A. In the dialog box Variable dependencies you can see a left right arrow between A and B. In the 3D History a red cross is shown at affected elements, the dialog box Notifications reflects the error and the 3D view does not show a model.

Recursive dependency -> Error

In the dialog box QA check an error message appears.

QA check with error "Recursion in algorithm"