Informix Error -4300

-4300 This statement contains too many levels of function call nesting.

This statement has calls to functions that are nested within the parameter lists of other function calls, to a level exceeding four. The maximum level supported is four, as in the following expression: Afun(2-Bfun(3+Cfun(4*Dfun(5)))).

Rewrite the expression to store the result of the innermost function calls in a variable, and use the variable in the expression.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-4300 fires when function calls are nested within other function calls' parameter lists beyond four levels deep — per the official guidance, the maximum supported nesting is four, as in Afun(2-Bfun(3+Cfun(4*Dfun(5)))).

Function calls nested more than four levels deep within each other's parameter lists, per the official guidance — the direct, only cause.

Solutions / Resolution

Rewrite the expression to store the innermost function calls' results in variables, per the official guidance, then use those variables in the outer expression.

Examples

Excessive function-call nesting

LET x = Afun(2-Bfun(3+Cfun(4*Dfun(5*Efun(6)))))
-- -4300: five levels of nested function calls exceeds the limit of four

Corrected

LET inner = Efun(6)
LET x = Afun(2-Bfun(3+Cfun(4*Dfun(5*inner))))

Diagnostic Checks

Count the nesting depth of function calls within a single expression, and store intermediate results in variables if it exceeds four.

Related Errors / Related Topics

-4301 — "The program has too many levels of WHILE, FOR, MENU, and/or CASE statements." A related nesting-depth limit, about control-structure nesting rather than function-call nesting.

An expression nests more than four levels of function calls — store intermediate results in variables instead.