Extract from
NBU7 Release Notes:
About the deduplication host supported platforms
The following is a list of the supported platforms for NetBackup Deduplication:
■ Solaris SPARC 10 x64
Solaris requires an encryption package (SUNWcry64). You must download and install the package. It is not part of the Solaris installation media, and Symantec cannot distribute the package.
Have you tried to locate the package on Sunsolve?