Diagnosis
You can call document flow updating for either one or multiple links.
Different parameter records are used to do this, depending on whetheronly one or multiple links are updated.
During the current call, the parameters are used inconsistently. Bothparameters for single calls and parameters for mass calls areused.
The description of the documents (IT_DOCUMENT) is the leading parameterused to differentiate between single and mass calls.

Procedure
Correct the document flow call.