When is a BOM Explosion Terminated?
In certain situations, the following checks can stop an assembly from being exploded:

In the list, you see a note on why the assembly has not been exploded. The note is in the component description line.
Recursiveness check
In the general item data of the BOM component that causes recursiveness, you can maintain the following indicators:
See
Recursiveness Check.If one of these indicator is set for a component, the BOM explosion stops at this component.
The following exception messages are defined:
REKU |
Recursiveness recognized by system |
NREK |
Recursiveness allowed |
Authorization check
In the BOM header, you can use the Authorization group to control access to the entire BOM. If access to a BOM is restricted by the authorization group, you can only access the BOM if your user master record contains the authorization group defined.
If you do not have the authorization required, the BOM explosion stops at the component (assembly) for which you are not authorized.
The following exception message is defined:
NBER |
Authorization group for component not in user profile |