SAP Message AO278 - Select a variant for plan value maintenance. DOCUMENTATION DiagnosisYou used the function for maintaining plan values of a variant, but youdid not not select a variant for detailed processing.ProcedureTo go to the maintenance of plan values for a variante, you can use oneof these procedures:Select the variant and then choose the function 'Planning.'Place the cursor on the row containing the variant, and choose thefunction 'Planning.'You can also reach the function for maintaining plan values from thedetail screen of the variant.