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YPERR_ACCESS (integer)

access violation (this has only been added recently and is only available from PECL SVN for now)

YPERR_BADARGS (integer)

The function arguments are bad

YPERR_BADDB (integer)

YP database is bad

YPERR_BUSY (integer)

Database busy

YPERR_DOMAIN (integer)

cannot bind to server in this domain

YPERR_KEY (integer)

no such key in map

YPERR_MAP (integer)

no such map in server's domain

YPERR_NODOM (integer)

Local domain name not set

YPERR_NOMORE (integer)

No more records in map database

YPERR_PMAP (integer)

Can't communicate with portmapper

YPERR_RESRC (integer)

resource allocation failure

YPERR_RPC (integer)

RPC failure - domain has been unbound

YPERR_YPBIND (integer)

Can't communicate with ypbind

YPERR_YPERR (integer)

internal yp server or client error

YPERR_YPSERV (integer)

Can't communicate with ypserv

YPERR_VERS (integer)

YP version mismatch