swremove selection had errors

doing swremove and getting error swremove: selection had errors.

Nothing further in the swremove.log or any of the swagent.log files in /var/adm/sw.  The problem turn out to be two bundles with the same name, one with the name uppercase, the other lowercase.  In order for the swremove command to work, I needed to specify both bunldes:

swremove BUNDLE1 bundle1