Diagnosis
You want to assign special number ranges to creation modes forassortments.
When doing so, take the following into account:
If you have only maintained an external number range for one creationtype (dialog or inbound), the non-maintained creation type is checkedagainst all external number ranges. This may lead to undesired overlaps.
The same applies to internal number ranges. However, the use of aninternal number range is not common for inbound processing.

Procedure
In the case of number range assignments (particulary external) for acreation mode, there must always be an inbound assignment for a dialogassignment.