DSNB807I `value` IS NOT A VALID PARAMETER FOR 'GBPOOLT'

Explanation
 An ALTER GROUPBUFFERPOOL command was issued with
an illegal value specified on the GBPOOLT (group buffer pool castout
threshold) keyword. The GBPOOLT value must be an integer between 0
and 90, inclusive.

System action
 The request is rejected.

System programmer response
 Reissue the -ALTER GROUPBUFFERPOOL
command, specifying an acceptable value for GBPOOLT.