Hidden Assemblies Command Problem in NX

In normal conditions, the Assembly commands exist in the Assemblies Ribbon Bar. In some conditions, the Assemblies Ribbon Bar might disappear in NX. This problem occurs because of the hidden and/or deactivated “Assemblies” function. 

To solve this problem first check the “Assemblies” is activated or not, then check the “Assemblies Ribbon Bar” visibility is turned on or not.

1. Activate the “Assemblies” function.
   1. File => Assemblies
   2. Application Ribbon Bar => Design Group => Toolbox drop-down arrow => Assemblies.
      
2. Turn on the “Assemblies Ribbon Bar” visibility.
   1. Right-click on the empty area of the ribbon bar as shown in the figure.
   2. Turn on the “Assemblies” in the opening list.
      
3. Assemblies Ribbon bar will be seen on the ribbon bar.