If you are creating duplicate documents during the match & merge process, you will possibly get this message.

When PaperFlow creates duplicate documents as a batch run process, it tries to create the duplicate document right after the document it duplicated. There is only so much room in the database for PaperFlow to add the duplicated documents if there are more documents after the original being duplicated. When it runs out of room, this message will be displayed and the remaining documents, if Ok is selected, will be placed at the end of the data group instead of as the next document. This message is simply a warning; it does not indicate an error has occurred.