"This operation cannot be performed in parallel: ... . Set ABBYY FineReader Engine for recognition in one process." error occurs during processing.
Certain methods in FineReader Engine require sequential processing. For example, when you set the SplitType property of the PageSplittingParams Object to PST_DoublePageSplit or PST_BusinessCardSplit.
In order to fix the error, you need to do the following:
- Create the MultiProcessingParams object.
- Set the MultiProcessingMode property to MPM_Sequential.
- Recompile your application.