Error saving Diagram. Out of memory

Such an error has been reported by a user in our company.

Quote: "I have run into some problems with Bizagi (...). When I attempt to save the diagram below, I’m told that there is an error in the model and asked if I’d like to review. If I click yes, the error bar appears but nothing shows - it’s just blank.. When I then attempt to save afterwards, I’m told that I cannot due to memory problems.. I’ve had this issue before, on the same diagram, and ended up having to start over - I’d really like to avoid having to start over for the third time.

I’ve attached a screen dump of the error message and empty error box (the white space below the diagram). I have no problems checking other diagrams in and out, so I doubt it really is a memory problem. "