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Informix Error -2936

-2936 The number of columns specified with the '-c' option or

in the screen section must be a positive integer from 30 to 600.

The horizontal size of the screen, as indicated in the SCREEN statement or in the -c command line option, is out of range. Change it to specify the expected size of the terminal where the form will be used.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-2936 fires when the horizontal size of a form's screen — set either in the SCREEN statement or via the form compiler's -c command-line option — falls outside the valid range of 30 to 600 columns, per the official guidance.

  1. A SCREEN statement or -c option value below 30 or above 600, per the official guidance — the direct, only cause.
Solutions / Resolution
  1. Change the value to specify the expected size of the terminal where the form will be used, per the official guidance.
Examples
An out-of-range -c value
form4gl -c 10 myform.per
Corrected
form4gl -c 80 myform.per
Diagnostic Checks
  1. Check the horizontal screen size in SCREEN or via -c, and set it within 30-600 to match the target terminal.
Related Errors / Related Topics
  • -2935 — "The number of lines specified with the '-l' option or in the screen section must be a positive integer from 6 to 600." The equivalent vertical-size range check, paired with this horizontal one.

The screen's horizontal column count is outside the valid 30-600 range — set it to match the target terminal's actual size.