The IXLCACHE Answer Area (IXLYCAA) supports several levels of information that IXLCACHE returns. Certain IXLCACHE requests might provide data that was not returned when the IXLCACHE service was first made available. For these request types, you must check the level of the IXLYCAA and ensure that the length of the answer area that you provide is capable of receiving all the data that the IXLCACHE request returns. For example, extended restart tokens might be returned for restarting a request. An extended restart token requires that the level-1 version of IXLYCAA be used and that its length be specified as CAALEVEL1LEN.

CAALEVEL1LEN is required when the version (PLISTVER) of the IXLCACHE macro is greater than 3. IBM® recommends that you use the level-1 version of IXLYCAA in case additional new data is returned by the IXLCACHE service. Note that the level-1 IXLYCAA mapping is larger than the level-0 IXLYCAA mapping.