IBM 3742 Reference Manual page 18

Error Correction
If a character keyed while verifying is not the same as the
corresponding character in the current record buffer, the
following occur:
1. The keyboard locks.
2. A V error code is displayed on the status line.
3.
The cursor stops under the position in error.
4.
The entire record is displayed.
Use RESET to reset the error condition and then correct
the character in error.
The first character key following the error is accepted if
the character keyed agrees with either the character in the
current record buffer or the character that caused the error.
If the first character key pressed following the error is not
accepted, a verify error is again displayed. The correction
process is continued until all corrections have been made to
the record.
Record Advance
When a record advance is performed on a corrected record,
the record is rewritten on the disk as corrected. If there
were no corrections to the record, it is not rewritten during
record advance. If no verification or correction to a record
has taken place and the cursor is in the first manual posi-
tion of the record, pressing R EC ADV causes a record
advance function to occur without verification of the
record. Pressing REC ADV when the cursor is in other
than the first manual position of a record causes all remain-
ing manual fields to be verified as blanks; remaining auto
dup fields are verified and bypass fields are bypassed.
Skip Functions
If SKIP is pressed or a programmed skip field is encoun-
teredduring verification, the entire field or the remainder
of the field is checked for blanks. If a nonblank character
is encountered, the cursor stops in that position, the skip
action terminates, and a V error is displayed. After press-
ing RESET, the nonblank character can be replaced with
a blank by pressing SKIP. The station then continued to
check the rest of the field for blanks.
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Display
During verification, the data record is displayed up to but
not including the cursor position. However, the
entire
record is displayed (1) after the record is moved into the
current record buffer, (2) after a record backspace opera-
tion, or (3) when an error occurs. The keystroke follow-
ing the RESET key returns the normal verify display mode.
Verification Code
After the last record in a data set has been verified, a
verification code (V) is automatically inserted in the verify
field of the data set label, the mode of operation changes
to a read index mode, the data set label is displayed, an E
alert is displayed, and program level 0 is selected.
Duplication Functions
Pressing DUP or entering a programmed duplication field
during data verification causes the rest of the field to be
verified automatically. The characters of the record in the
current record buffer are compared with the corresponding
characters in the previous record buffer. If one of the char-
acters in the record disagrees with the corresponding char-
acter in the previous record buffer, a verify error is posted.
After RESET is pressed, the character from the previous
record buffer can be inserted into the current record buffer
by pressing DUP. The device then continues comparing the
field.
When using the auxiliary duplication feature, the characters
in the record are compared with the corresponding charac-
ters in the program buffer 4.
Right-Adjust Fields
If a right-adjust field is encountered while verifying data,
the cursor stays in the first position of the field until the
first data key is pressed. The fill characters are compared
depending on the field definition characters, and then the
first data character keyed is compared with the first nonfill
character in the field. If the characters do not agree, a V
error occu rs.
To exit from the right-adjust field after verifying the last
character in the field, press either RIGHT ADJ or the dash
(-) key. RIGHT ADJ and the dash key also verify the field's
sign, unless the field is alphabetic. (The dash key is used to
verify a numeric field having a minus sign.) If the right-
adjust field is alphabetic, the last character in the field is
verified in the same way as a character in any other position
in the field.