vw crashes when closing the program....

[Phil hunt]

i may have posted this before

but the software itself is working fine with the odd crash during operations

i can live with the odd crash...so not a problem

but when i close vectorworks it comes up with vectorworks 2016 quit unexpectedly....as i said it does not affect the software whilst i am working on a project

i have tried closing a file at a time

and saving each file and then quitting the program

i have come to live with this as i don't really want to reinstall the software from scratch

these are the top 8 lines of the crash report

Process: Vectorworks [43933]

Path: /Applications/Vectorworks 2016/Vectorworks 2016.app/Contents/MacOS/Vectorworks

Identifier: net.nemetschek.vectorworks

Version: 21.0.2 [288897] (21.0.2)

Code Type: X86-64 (Native)

Parent Process: launchd [180]

Responsible: Vectorworks [43933]

User ID: 501

any comments or help to solve this would be appreciated