The pragma provides an estimated value for the stack size requirement.

Methods with recursive calls cannot pass a stack check because stack usage cannot be determined. As a result, a warning is issued. To prevent this warning, you can give the method an estimated value (in bytes) for the stack size requirement. Then the method passes the stack check successfully.

Syntax

‎{attribute 'estimated-stack-usage' := ' <estimated stack size in bytes> '}‎

Insert location: First line above the declaration part of the method.

{attribute 'estimated-stack-usage' := '127'} // 127 bytes
METHOD PUBLIC DoIt : BOOL
VAR_INPUT
END_VAR

For more information, see: ⮫ “Calling a Method ”