Definition of 4123D


4123D WRONG POSITN, READBK filename SYSxxx=cuu
Cause: Read backward was specified and no tapemark or label was found as the second
record. IOCS cannot position the tape correctly.
The tape is not correctly assigned, or
The tape file was not properly closed after output, or
The read backward DTF contains an incorrect logical unit specification, or
The tape has been physically repositioned since completion of an output function.
System Action: This message is followed by the last tape record read. If SYSLOG is
assigned to a keyboard, the system waits for an operator response; otherwise, the job is
Programmer Action: Check that the correct logical unit was specified, and that the output
portion of the problem program issues a CLOSE.
Check that no reference to that logical unit is made after the CLOSE for the output portion of
the program is issued, or before the OPEN for the readback is issued.
If the problem recurs, have the
· log sheet
· program listing
· job stream
· printer output
available for problem determination.
Operator Action: Type CANCEL or press END/ENTER to cancel the job, or
Type IGNORE to continue processing. (File is considered open but no further checking or
positioning is done.)

Used with Courtesy and Permission of International Business Machines, Inc.