Diagnosis
You have selected the same syntax for at least two linking operators.As a result the type of link cannot be differentiated during the queryof a content provider.
Note that an empty field can also be selected as a linking operator.Therefore, this message can also occur when you leave at least twofields empty for linking operators and in addition have not set theindicator "Not supported" for these fields.

Procedure
Make sure that unique values are entered for those operators which youmaintain for a content provider, and for which the indicator "Notsupported" is not set.
If the F4 possible entries for the syntax of linking operators is stillempty, you must first create the operators. To do this you use therespective Customizing transaction for the individual operators.