Message CASD6819 states the following
CA SymDump not available on this system as set in CAVHCONF Reason: The CAVHCONF configuration module, which is loaded into the CSA, indicates that the product is not intended to be used on this system.
Action: Contact your systems programmer to ensure that the CAVHCONF configuration macro was implemented correctly on this system and that the CAVHINIT process was run.
The CAVHCONF global option PINT option states the following
Specifies whether a product can be used on a specific LPAR. If permitted, then the normal LMP checks for that product are performed. If not permitted, a message appears stating that the product is unavailable on this LPAR.
(This message appears in place of an LMP warning.) The default value is DYNAMIC. This value causes the product to determine which products have valid LMP keys on an LPAR.
The product then sets the product intent values accordingly.
The Symdump CICS documentation can be found at the Broadcom web site