Thaknks for the info.
Glad to note that it includes CR 799010.
We were caught up in heap memory pool leak due use of set_appcontext call in our login trigger.
That fragmented heap pool so badly that even simple queries started giving error 712.
Rebooting the ASE instance was only way to fix the situation.
We got a 1-off to fix the issue till we upgrade.
Avinash