SAP Message 64283 - Posting exists in securities account &1, posting date &2, daybook no. &3

There is a flow which changes the position after the order you havejust processed. You have, however, already carried out period-endclosing for this flow. System Response You are not allowed to make a posting if the position value date fallswithin the closed period. Procedure If you really want to post in the closed period, then you have toreverse all flows affecting the position in reverse chronologicalorder, until you reach the position value date entered in the order.