If you issue IXGDELET and IXGBRWSE requests concurrently, be careful not to delete information before you try to read it. An IXGDELET request can also affect a browse session for a log stream by deleting a requested log block or the log block where the browse cursor is positioned. When an application issues an IXGBRWSE request for log data which has been deleted, the IXGBRWSE request will return non-zero return and reason codes.
Applications might want to provide serialization on the log stream or some other installation protocol to prevent deletes (IXGDELET service) from being performed by other applications on the log stream during a browse session.