Safety and Stability are always the main target for developing "LayerManager Professional",and all user feedback is always included and respected therefor, it is not possible to ensure 100% safety against programming errors and issues during run-time of software.
There are lots of reasons, especially in the complex co-operation of software-components, that are responsible for most of all bugs and issues:
ALWAYS check and repair your drawing using the "_recover" and "_audit" commands, sometimes in multiple cycles. Insert that "recovered" and "audited" drawing as "exploded insert" into an new, empty drawing (at point 0,0,0). If the discovered bug still remains, then it is a good idea to send us the bug-report, please !
From our customers' experience, it is always strongly recommended, to "_recover" and "_audit" all your working drawings once each day - it is YOUR time and YOUR money, if the drawing is getting corrupt in unrecoverable way, even if you could work on a drawing for weeks without any problems ! Backup drawing files may also contain all that drawing defects, so these backups are (mostly) useless in such situations ! It is proved, that AutoCAD® seriously produces drawing defects [see AutoCAD® NewsGroups on the WWW].
Please describe your software configuration and the discovered (potentially) bug with the following form sheet; sending us an example drawing is also very helpfully to reproduce the described bug.
Many thanks for all your efforts and co-operation in forward - and our promise to work hard to fix any bugs and issues. As an evidence may stand, that all bugs could be fixed within one week (mostly within 2...3 days) - and this should be continued !
Of course, we will get in contact with you for further details and clearings !