On view modifications like changing from wire-frame to shaded.
On modification or creation of any NX object.
Production: NX10.0.3, VERICUT 8.1, FBM, MRL 3.1.7 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 11.4
Development: C (ITK), .NET, Tcl/Tk Testing: NX12.0 | AWC 3.4 Preparing: NX12.0
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How to Get the Most from Your Signature in the Community
NX Customization - Best Practice Guide
If you open a file that was last saved in an older version of NX, the file structure will be updated to your current version and it will be marked as modified. If you have a lot of older "read-only" files, there will be a small performance hit every time you open the file. It is a good idea to run the "refile_part" utility on your parts when you upgrade NX.