Saving a design is denied

I’m working with ZW3DCAD 2019.
I designed a representation of a PCB with lots of components. Finally the program denied to save it. The last state before is attached.
Is the number of components responsible for this behaviour?

BR
EckhardDVR42_Mainboard.Z3 (3,6 MB)

This problems was solved by its own!
During a program crash the system forgot the dongle and it’s ID-Code. After re-entry the ID-Code the program works as it should.
Eckhard

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