This DTP processing message occurs during the cleanup part of the box keep, box modify, or box delete, actions of minicalendar text framing and shading, if one of the boxes that are marked for deletion (actually are not marked for keeping) is invalid.

This could be due to nested grouping.

In any case, if you encounter this error, please send us the script via technical support.

Topic 182205, last updated on 06-Aug-2022