SAP Message C0587 - Complete the process step first DOCUMENTATION DiagnosisYou cannot sign the process step as it has not been completelyprocessed. This may be due to the following reasons:You have not yet maintained all input values.You have not yet filled in the minimum number of lines required in atable according to the process instruction.A formula result has not yet been calculated.ProcedureAdd the data missing between the current signature and the previousone.