If one of the target systems does not know the object type Employee, you must replace the relationship between the position and the employee in the HR system with the relationship between the position and the user. The infotype 0105 links the employee with a user ID.
The customer exit time-dependently inserts the S-US relationships in addition to the S-P-US relationships. The ALE Filter filters out either the S-US relationships or the S-P relationships, depending on whether or not the system knows the object type Employee. In target systems with the object type Employee, the S-P-US relationships are retained, and in target systems without the Employee object type, the S-US relationships are retained. It is therefore vital that you have maintained the filter settings correctly.
If the include is not yet available to you, import the correction instructions from SAP Note 581019.