Do you know, że… ?
When working with models often we introduce various changes and amendments. In this case, errors may occur, e.g. reference date.
For operations rounding, if there are errors in tree, you must edit it. In the Properties window operations will be out of date specified reference (in this case the edges). Just right-click and choose Fix all missing references.
After such operation errors disappeared. But one must have in mind, that the program can not always fix all the outdated references, and some may require a manual indication.
