Diagnosis
In a MultiProvider, each characteristic must correspond exactly to acharacteristic or navigation attribute in each InfoProvider that isinvolved (if it exists in it).
In ambiguous cases, use a dialog (by selecting) to display theInfoObject to which the MultiProvider characteristic should beassigned.

Example
The MultiProvider contains the characteristic: 0COUNTRY, an involvedInfoProvider contains both the characteristic 0COUNTRY and thenavigation attribute 0CUSTOMER__0COUNTRY (= country of customer).
In this case select exactly one of these InfoObjects in the assignmenttable.