I have installed ZEN 7 in an environment which had Zen 4, but never had
inventory installed.
The db and inventory service objects were auto-created successfully.
I've configured the inventory service object. I've configured the
database policy on the server policy package.
I've configured the workstation inventory policy on the workstation
package, which is associated to one of the workstation OUs.

I rebooted one of the associated workstations, went into wmsched and
verified that the workstation inventory policy shows up. However, I can
either click the RUN NOW button, or have a specified inventory time come
and go, and the workstation doesn't do an inventory. The "currently
running" column changes to "yes" for about 4 seconds, and no STR files
are created on the server.