Feature structure cannot be recognized, please see documentation

What causes this issue?

Cause 1:
The structure of the feature is not saved in the feature directory.
Cause 2:
The feature structure is not defined in the program that reads the
feature.
Cause 3:
The feature that the program expects does not match the actual feature
structure.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Cause 1:
Please advise your system administrator that all features must be
regenerated. Please note that this generation must take place in client
000 first, and then in all other clients (report RPUMKF00 or the
Generation function in the feature maintenance transaction (transaction
PE03)).
Cause 2:
The feature structure must always be defined in the program reading the
feature (see documentation for program RPUMKC00).
Cause 3:
Please contact your system administrator

Error message extract from SAP system. Copyright SAP SE.