I would highly appreciate any kind of help on this.
Thanks
-Brijesh
Specific SQL issues:
http://www.sybase.com/files/White_Papers/SY-Required-SQL-Changes-for-ASE15-v.1-073009-WP.pdf
General link for migration issues (and is not particularly "normalised"):
http://www.sybase.com/support/techdocs/migration