SAP Message R9025 - Incorrect formula component: &

Diagnosis
An incorrect component was recognized in the formula.

Procedure
Check whether all formula components have been written correctly. Ifoperators are allowed then the following is valid: operators like 'ABS'for the absolute amount must be written as follows 'ABS ( K1 )',whereby 'K1' represents a valid key figure. If variables are allowed tobe used in formulas in the application, they begin with '&' and have amaximum of 9 digits (including '&').