Spectrum Version 9.1
Enterprise Designer will show an error after runing the data flow if in the read from file stage options, Runtime tab, Max Records is set to 1001 or above. This is with a "record joiner" stage in it.
This happens because the "record joiner" is not accepting 1001 or more instances/records.
ResolutionUPDATED: August 24, 2017
Our engineering team determined this is a defect that requires a patch. Fix was implemented in patch 9.1 S17.