Transactions with the state order reserved

Hi,

We posted a sales order to a customer, which detonated an intercompany purchase order in company A, which in return launched an intercompany sales order in company B. When we try to post the intercompany purchase order lines through Inventory > Post, we get an error message: "There are transactions with the state order reserved… " Seems to link sales order inventory dimensions with the intercompany orders’ dimensions, since we can only post the order’s lines by using the same inventory dimensions as in the original sales order. Any ideas on how to solve this?