IBM 3741 Data Station Reference Manual page 99

When this error occurs, the teleprocessing is complete, but
the data set is not printed. To print the data set, the opera-
tor must perform the following:
a. Place the disk in the first disk drive.
b. Record advance (if necessary) to the data set label
for the data set you want to print.
c. Turn the AUTO R EC AOV switch on.
d. Press FUNCT SEL upper and PRINT TO EOO.
4. Errors for which there is an error indication to the
operator and the 3741 cannot perform automatic
recovery (unrecoverable communication errors).
The following sections provide information on
operator error recovery procedures for unrecoverable
communications errors (those errors that the 3741
cannot automatically perform error recovery).
After an unrecoverable communications error (operator
intervention required) has occurred, the 3741 Models 2
and 4 have the ability to restart the communications mode
under operator control. The operator can restart the com-
munications operation from:
• The beginning of the communications operation.
• The beginning of a data set.
• Any point within a data set.
When an unrecoverable communications error occurs the
operator can examine records in the data set to determine
the record location at the time of the error. Then, through
mutual agreement with the far end location (either through
earlier agreed upon procedures, or by direct voice contact)
the communications can be restarted from the beginning of
the communications operation, from the beginning of the
data set, or from any point within the data set, depending
on the limitations of the device at the far end location.
For example, if receiving when an unrecoverable communi-
cations error occurs, the data set label of the last data set
being received is displayed on the CRT display. The oper-
ator could use the search EOO operation to determine the
last record received before the error occurred. When the
record is displayed, the operator can inform the trans-
mitting location (through talk mode) of the last record
received and begin the communication from any desired
point.
If transmitting data when an unrecoverable communication
error occurs, the record address after the last acknowledged
transmitted record is displayed on the CRT display. The
operator can inform the receiving location of the record
not transmitted and begin transmitting from any desired
point.
See
Track and Sector Indicators
in this chapter for infor-
mation on the exact condition displayed when an error
occurs.
Communications 93