I am trying to reclaim tdev for VMAX-1 that is running on 5876 code.  I am still has no idea what feature is missing here

SE 8.1

# symconfigure -sid xxx-cmd "start reclaim on tdev 619;" preview -nop

A Configuration Change operation is in progress. Please wait...

    Establishing a configuration change session...............Established.

    Error occurred while Defining change number 1:

    The requested feature is not supported for this microcode or SYMAPI version

    Terminating the configuration change session..............Done.

The configuration change session has failed.