Informix Error -1107

Reasons / Common Causes

-1107 fires when a screen array's subscript, used in an INPUT, DISPLAY, or CONSTRUCT statement, is either less than 1 or greater than the number of fields actually in the array — per the official guidance, this requires reviewing both the program source and the form specification together to locate.

1. A subscript less than 1, per the official guidance — an off-by-one or zero-based indexing mistake against Informix's 1-based screen array indexing.
2. A subscript greater than the number of fields defined in the screen array, per the official guidance — the array in the form specification has fewer fields than the program code assumes.

Solutions / Resolution

1. Review the program source alongside the form specification, per the official guidance, to find where the subscript and the actual array size disagree.
2. Correct the subscript bounds in the program logic, or extend the screen array in the form specification, whichever reflects the actual intended design.

Examples

A subscript beyond the array's size

-- form specification defines a screen array with 5 rows
-- program code:
FOR i = 1 TO 6
  DISPLAY item_row[i] TO scr_item[i]
END FOR
-- -1107: scr_item[6] doesn't exist; the screen array only has 5 rows

Diagnostic Checks

1. Compare the subscript range used in the program against the actual number of fields defined for the screen array in the form specification.

Related Errors / Related Topics

No closely related error codes are cross-referenced for -1107 in this set yet.

A screen array subscript fell outside 1..N (N = the array's actual field count) — review the program source against the form specification to find the mismatch.