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Delete is grayed out when attempting to delete a User Field in the Part
Navigator (PNT) via the MB3 popup.
Solution
The User Field(s) may be in use by a Material. Select Tools --> Materials -->
Manage Materials --> set Material List dropdown to Local Materials. Delete
the materials and you can then delete the User Fields in the PNT.
Notes and References
Hardware/Software Configuration
Platform: na
OS: n/a
OS Version: n/a
Product: NX
Application: ASSEMBLIES
Version: V1847
Function: NAVIGATORS
Ref: 001-6829467