In the part navigator it list a Pattern feature, and below it list multiple pattern features named Reference.
Solution
This will occur when creating a Pattern Feature using the "Simple" pattern method and selecting multiple features to create a pattern,An alert will display when creating the Pattern with a similar message;
Alerts;
Multiple features selected with Pattern Method set to Simple. Feature Simple Hole(2) will be created as 'master' pattern. All other selected features will result in Reference patterns. To create a single pattern with all the selected features, change Method to Variational.
Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: 1064
Product: NX
Application: DESIGN
Version: V12.0.2
Function: FEATURE_MODEL
Ref: 001-9518551