On Linux, have you ever tried to load a database from backups with dozens of stripes and it failed even though you increased the resources on the backup server? Well, I recently ran into it while trying to load a 1TB database from over 100 stripe files.
Backup Server: 126.96.36.199: Bitmap routine called by function AT_ISSTRIPELDED returned -1
Backup Server: 188.8.131.52: Bitmap routine called by function AT_ISSTRIPELDED returned -1
This turns out to be a new bug with the Sybase Backupserver (both 12.5x and 15.0x codelines): CR 466497. If you run into this bug, please open a case with Sybase TechSupport and have your ticket associated with this bug.
WORKAROUND: Unfortunately, you will need to backup your database(s) with 32 stripes or less.