About character limits in text extracts

For text input formats (Delimited and Vertical), Forge has a built-in hard limit of 64K per record.

This built-in limit cannot be configured; however, there are two workarounds:

Change the format to XML.
Put large text fields into files, and include the filename in the record. Use the IMPORT_PROP expression to read the file into the record (or leave it on disk, if all you're going to do is run PARSE or CONVERTTOTEXT on it).