Diagnosis
The selected dimension was defined as a "Line Item Dimension", meaninga dimension that should contain exactly one characteristic (forexample, document number).
This is a special case for the dimension definition whereby a pointeris not written to a dimension table in the fact table of the InfoCube(as usual), but rather directly to the (SID) value of thecharacteristic.
Several characteristics should now be assigned to the selecteddimension. This is not possible; a line item dimension can only includeexactly one characteristic.

Procedure
Decide which characteristic should be assigned to the "line itemdimension" and assign all other characteristics to other dimensions or
define the dimension as a normal dimension.