When attempting to create a SM Louver, the operation is failing with "Section must lie on a face" even after having created a sketch directly on the SM Tab face....
Solution
This issue was reported by PR 9169883 which has the following final response:
The problem where "Louver will not work if the work layer is not set to the solid layer" has been fixed in NX1847.
Changing the work layer to the layer with the SM body should allow the Louver to be created successfully.
Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: 1064
Product: NX
Application: NX_SHEET_METAL
Version: V1847
Function: LOUVER
Ref: 001-9532375