Informix Error -7530: Missing parenthesis in the signature specified for user-defined routine lookup.

Reasons / Common Causes

-7530 fires when a UDR signature used for fastpath execution lookup is missing a parenthesis — per the official guidance.

1. A UDR signature missing an opening or closing parenthesis, per the official guidance — the direct, only cause.

Solutions / Resolution

1. Verify the signature for the routine specified for fastpath execution, per the official guidance.

Examples

A malformed routine signature

mi_routine_lookup(conn, "compute_total decimal", ...);
/* -7530: missing parentheses around the argument list */

Corrected

mi_routine_lookup(conn, "compute_total(decimal)", ...);

Diagnostic Checks

1. Check the routine signature string for balanced, present parentheses around the argument list.

Related Errors / Related Topics

• -7531 — "Invalid user defined routine type: must be function or procedure." A related UDR-lookup error, about the routine's type rather than its signature syntax.
• -7532 — "Error converting type in string format to id format" A related UDR-lookup error, about a type name within the signature failing to resolve rather than a missing parenthesis.

A UDR signature for fastpath lookup is missing a parenthesis — check the signature string.