DFHNC0407 CF structure strname is not available for shared use.
Explanation
The named counter sequence number pool is currently locked for exclusive use by some other job such as a pool unload or reload job. (This serialization uses an MVS ENQ with scope SYSTEMS, major name 'SYSZDFH' and minor name equal to the structure name, 'DFHNCLS_poolname').
System action
The server is terminated.
User response
Check whether a pool maintenance job is currently running. If it is, wait until it has finished before trying to start the server again. You can find out what jobs are currently using the pool using this MVS command:
DISPLAY GRS,RES=(SYSZDFH,'DFHNCLS_poolname')
Note that for this command the pool name must be exactly eight characters, padded with trailing spaces if necessary.
Module
DFHNCCFDestination
Console and SYSPRINT