J3/01-244

Date:    6 June 2001
To:      J3
From:    Dan Nagle
Subject: Constrain INPUT_UNIT, OUTPUT_UNIT, & ERROR_UNIT

In order to prevent ambiguity between the NUMBER=
value returned from INQUIRE when the file is not connected,
the preconnected units should not be allowed to be -1.

Edits:

338:10+ Add
"The value shall not be -1."

338:13+ Add
"The value shall not be -1."

338:17+ Add
"The value shall not be -1."