Sybase protocol driver failed

Error Message:
---------------------------
Warning
---------------------------
[SYBASE][ODBC Sybase driver][Sybase]ct_connect(): user api layer: internal Client Library error: Read from the server has timed out.[SYBASE][ODBC Sybase driver][Sybase]ct_connect(): network packet layer: internal net library error: Net-Lib protocol driver call to connect two endpoints failed

Possible Cause:
Usually caused by an open client problem. This is conectivity problem.

Resolution:
use dsedit to check the connection string for the desired server entry.
if the server does not exist, add the connection info

OR

Check sybase open client location
go to environtment system variable
check on the value of variable SYBASE
or

go to command prompt
type: echo %SYBASE%

open %SYBASE%\INI\sql.ini
add conection entry for the desired server
[SybaseASEName]
query=protocol,hostname,sybase_port_number_on_hostname
master=protocol,hostname,sybase_port_number_on_hostname

example :
sybase server instance name is : local_001
hostname for local_001 is server_001
port number used for sybase in server_001 is 5000
protocoll used is WINSOCK (NLWNSCK)

the entry is as follow:
[local_001]
query=NLWNSCK,server_001,5000
master=NLWNSCK,server_001,5000