The "Backout" feature is only available if you are using Endevor Packages.
The following situations will cause the Package Backout feature to not be available:
1 - An element's outputs are executed outside of a Package
2 - An element's outputs are executed Package with backout disabled:
When creating package activate option "ENABLE BACKOUT ===> Y (Y/N)"
3 -If you use the Endevor Processor keyword BACKOUT=N on the DD statement for library which you want to activate the Backout feature.
Also, Check the following ENCOPTBL option related to Backout:
And if you plan to use the Package Shipment feature:
Note: Actions affecting an Element's outputs executed outside of a Package (or in a Package with backout disabled) will invalidate the backout information for the last Package and all previous Packages depending on that Package.