DSNB809I `value` IS NOT A VALID PARAMETER FOR 'GBPCHKPT'

Explanation
 An ALTER GROUPBUFFERPOOL command was issued with
an illegal value specified on the GBPCHKPT (group buffer pool checkpoint)
keyword. The GBPCHKPT value must be an integer between 1 and 999999,
inclusive.

System action
 The request is rejected.

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