"Access Violation at address XXX in module 'OptAccpac.dll' error when drilling down in O/E Order Entry

When drilling down into the shipment or invoice for Ops Inquiry for both fields (Last Shipment No. and Last Invoice No.) in Order Entry , it gives us the following error: "Access Violation at address XXX in module 'OptAccpac.dll' "error when drilling down in O/E Order Entry.