Sybase IQ 15.4 no longer supports some Sybase IQ 12.7/12.6
features and objects. To avoid potential problems, correct these
items before you migrate your database.
Note: During migration, the Sybase IQ 15.4 server creates a
message file (*.iqmsg.R) as it reloads
the generated schema. This file is normally deleted as part of a
cleanup operation for successful migrations. If the migration fails during
the reload stage, cleanup does not occur, and *.iqmsg.R remains
in the unload directory. *.iqmsg.R may
contain information that can help solve your migration problems.