Informix Error -3756

Reasons / Common Causes

-3756 fires when a field not belonging to the current table is targeted for a value assignment — per the official guidance, the cursor isn't allowed to enter such fields, and values can't be set in them.

1. The targeted field doesn't belong to the current table, per the official guidance — the direct, only cause.

Solutions / Resolution

1. Target a field that belongs to the current table, consistent with the official guidance's identification of table membership as the requirement.

Examples

Checking a field's table membership

Confirm which table a field tag's underlying column belongs to (via the form's ATTRIBUTES section) before attempting to assign it a value from code operating on a different table's current row.

Diagnostic Checks

1. Check which table the targeted field's column belongs to, and confirm it matches the table currently being operated on.

Related Errors / Related Topics

• -3755 — "The selected display-only field tagname cannot be accessed." A related cursor-placement error, about a field being marked DISPLAYONLY rather than not belonging to the current table.
• -3758 — "The next selected field tag-name is not in the current table." A closely related error, about this same not-in-current-table condition surfaced during pf_nxfield() navigation rather than value assignment.

The targeted field doesn't belong to the current table — values can't be assigned to it right now.