From cust--Support translated:
I was able to connect my NetMasters but the wrong way. Via /MADMIN.U
I disconnected but cannot take this region out of FOCAL.
Support update: The 27.11 doc was a Browse of A06NETM (NETMD)
showing it as Focal. The 28.11 doc was an attempt to Synch
A06NETM (NETMD) as Subordinate to A07NETM
(NETMF) that failed with:
RMSY0214 SYNCHRONIZE ATTEMPT REJECTED – A07NETM IS A
There must be another Focal region on the multisystem that region
A06NETM (NETMD) can be linked to as Subordinate.
Cust response: I reinstalled NM deleting all previous datasets. I redid the
connections and now all is OK.