If a second request requires a record that is in a buffer in which a previous request is positioned, the second request might fail with an exclusive control error (RPLERRCD field at RPL +X'0F' = X'14'). If a message area is provided in the second RPL, VSAM record management returns the address of the RPL that has the position of the resource in the message area of the second RPL. You are responsible for relinquishing position in the initial RPL before redriving the second RPL.

An exclusive control conflict might also arise if an initial request causes a CI or CA split. A second request might receive RPLERRCD = X'14' as just mentioned, if it needs a record in the same CI or CA. You should either wait for completion of the request whose RPL is pointed to by the second RPL's message area, or issue "ENDREQ" against the RPL pointed to by the second RPL's message area before redriving the second request.