After the server reboot I can not login to baan ( Error 510 database not on ).
However I can see this error in log.blogind6.1

2007-07-26[09:27:22]:E:root: ******* S T A R T of Error message *******
2007-07-26[09:27:22]:E:root: Log message called from /port.6.1c.06.06/vobs/tt/lib/nw_1/sock_server.c: #94 keyword: rexecd
2007-07-26[09:27:22]:E:root: Pid 14291 Uid 0 Euid 0 Gid 3 Egid 3
2007-07-26[09:27:22]:E:root: user_type S language 2 user_name root tty locale ISO88591/NULL
2007-07-26[09:27:22]:E:root: Errno 226 (Address already in use) bdb_errno 0
2007-07-26[09:27:22]:E:root: Log_mesg: TCP bind() to port 7150 failed, error 226
2007-07-26[09:27:22]:E:root: ******* E N D of Error message *******
2007-07-26[09:27:22]:E:root:
2007-07-26[09:27:22]:E:root: ******* S T A R T of Error message *******
2007-07-26[09:27:22]:E:root: Log message called from /port.6.1c.06.06/vobs/tt/nw/blogind.c: #265 keyword: blogind
2007-07-26[09:27:22]:E:root: Pid 14291 Uid 0 Euid 0 Gid 3 Egid 3
2007-07-26[09:27:22]:E:root: user_type S language 2 user_name root tty locale ISO88591/NULL
2007-07-26[09:27:22]:E:root: Errno 226 (Address already in use) bdb_errno 0
2007-07-26[09:27:22]:E:root: Log_mesg: Could not create listen socket
2007-07-26[09:27:22]:E:root: ******* E N D of Error message *******

I know that I should connect to prt 512 not 7150. Where can I change that.

Change Port Number to 512 in BW Client Configuration (If that is the port where "Rexec" service is running).

If the error is "Database not on",
then try to connect to your DB with some other utility liks "sqlplus" or "enterprise manager" and check if you can connect.

Thank you fro the reply.
When I try to conect with Enterprice Manager, I am getting the error:

ORA-12541: TNS:no listener

This is a DB problem. DB instance and/or Oracle Listener is not running. First start the DB, try to connect it through sqlplus and after confirmation, try connecting through BAAN.

Regards,
Kaustubh