Perform Drafting Preferences reset by Loading from Setting Source = Customer Defaults, it is failing with following error:
The initial secondary number is not in valid format
Solution
In Drafting standard, the default value defined for Drawing Sheet format, there is a required condition in NX that may trigger such an error:
If the primary character is a numeral, then the secondary character must be a letter. Likewise a primary letter character requires that the secondary character be a numeral.
Examine the settings in your Customer Defaults:
For NX8.5 and NX9:
Drafting -> Drawing, General tab:
Make sure Initial Sheet Number and Secondary Number are not both numeral or both letter.
For NX10:
Drafting Standards -> Drawing Format -> Sheet, in the "Name and Number" tab:
Make sure Initial Sheet Number and Secondary Number are not both numeral or both letter.
Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: window
OS Version: 764SP1
Product: NX
Application: DRAFTING
Version: V11.0
Function: ANNOTATION
Ref: 001-7572604