Specify IXGINVNT REQUEST=DEFINE,TYPE=LOGSTREAM,NAME=like.log.stream,...,DIAG=YES
Then IXGINVNT REQUEST=DEFINE,TYPE=LOGSTREAM,LIKE=like.log.stream
Specify DEFINE LOGSTREAM NAME (like.log.stream) ... DIAG(YES)
Then DEFINE LOGSTREAM LIKE(like.log.stream)