use tempdb
go
sp_helpsegment "default"
go

Do any of the following 
1. restart the sybase database server
2. alter the size of the tempdb

If your tempdb gets full you can do one of following:
you can expand your tempdb or you can use

select lct_admin(0,2)
go
It will abort all open transactions.But be sure the task by 
confirming with the concern users.
Restarting the server is not recommanded.

lct_admin (0,2) would abort all open transactions, or you 
can go for altering the tempdb space. Multiple tempdb's is 
a feature which can be implemented to minimize such issues 
of tempdb getting full.

if the system temp db gets filled, even sa cannot get 
connected to that temp db  to check which processes are 
blocking, in order to avoid this , a good concept of 
multiple temp dbs can be implemented and we can create temp 
dbs and assign newly created temp db to sa, so that sa 
could get the info of the processes that is blocking temp 
db, ab=nd by using lct_admin or some other commands we can 
abort that blocking transaction.

use tempdb
go
sp_helpsegment "default"
go

If the transaction log of tempdb is full then you call 
login through sa and type following command.
> dump tran tempdb with trancate_only
> go

If the database is full then you can increase the size of 
the database on a free device.
> alter database tempdb on device_name = size
> go