SAP Message AP181 - Plan version &1 is not allowed

Diagnosis
You tried to enter plan values for an investment program in planversion &V1&. However, this is possible only if you specifically assignplan version &V1& to approval year &V2& and program type &V3&.

Procedure
Either assign plan version &V1& to approval year &V2& and program typeV3, or plan only in version 0.