Processing 3270 Data Streams

When processing a 3270 data stream, PC/3270 treats Begin or End of File structured fields as follows:
  • A Begin of File structured field indicates that the next presentation space print (initiated by a write type command with the start print bit turned on in the write control character) is the first in a print job.
  • An End of File structured field indicates that the last presentation space print was the last of the current print job. The emulator immediately sends a terminate string to the printer to close the printer session.

If PC/3270 receives a Begin of File structured field and an End of File structured field without at least one presentation space separating them, it ignores the structured fields.

Parent topic: Begin/End of File Structured Fields