Informix Error -16355: Function function-name requires parameters.

Cause and resolution

Function function-name requires parameters.

The function that the CALL command names is defined as taking one or more parameters. You must enter a matching number of parameters in the parentheses following the name of the function. If you are not sure what parameters should be passed to the function, use a VIEW command to display its source code.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-16355 fires when a CALL command names a function that takes parameters, but none (or too few) are given — per the official guidance.

A CALL command missing one or more required parameters, per the official guidance — the direct, only cause.

Solutions / Resolution

Enter a matching number of parameters in the parentheses following the function name, per the official guidance.
Use VIEW to display the function's source code if unsure what parameters it expects, per the official guidance.

Examples

A CALL command missing required parameters

> CALL myfunc()

Corrected

> CALL myfunc(arg1, arg2)

Diagnostic Checks

Use VIEW on the function's source to confirm its expected parameter count.

Related Errors / Related Topics

-16356 — "Too many parameters passed to function function-name." The mirror-image error, about too many parameters rather than too few.

A CALL command is missing required parameters — check the function's expected parameter count via VIEW.