Thanks for reporting this. We'll take a look and get it fixed.
We've identified that the issue is not with cloning but with mirroring the cloned copy. We are working on a fix for the next version.
Awesome! Thank you!
We have fixed the problem. It will be published soon but I will contact you off the forum to provide the version link as soon as it is available.
Thank you Glenn! I appreciate it!
I have good news! We published the update today (NestFab v3.1.5) with the fix for the issue you reported. Please start NestFab and click the "Check for Updates" link on the Welcome Screen.
Let me know how you get on.
Warren, Jake
Once a dxf has been cloned, it will always have a negative Area after saving, closing, re-opening nest fab