No longer in GT.M since: V5.3-003
MTRDTHENWRT, Attempt to read after a write to a magtape
Run Time Error: This indicates that a READ command followed a WRITE command to a magnetic tape with no intervening positioning toward the beginning of the tape.
Action: Look for a logic problem or a missing USE command. If previously written data is to be read, the tape must first be repositioned by a REWIND, a SKIP, or a SPACE with negative arguments.
