PTC Solution installer fails to install with error AddColumns -u -s process returned non-zero: 1 in Windchill

• PTC Solution installer fails to install with error “AddColumns -u -s process returned non-zero: 1”
• PTC Solution installer fails to install with error ”Error during schema creation“
• Installation of ProjectLink on existing Windchill failed during loading schema
• Installation log reports following error

Updating database schema... be patient. 
INFO   date/time - Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; support was removed in 8.0 
INFO   date/time - joining with std out thread 
INFO   date/time- std out join complete. 
INFO   date/time - joining with std error thread 
INFO   date/time - std err join complete. 
FATAL  date/time - AddColumns -u -s process returned non-zero: 1 
DEBUG  date/time - Installation is Aborting.  The installation cannot continue.
 
FATAL  date/time - Aborting installation. 
FATAL  date/time - Installation is Aborting.  The installation cannot continue.
 
FATAL  date/time - Error during schema creation, while adding columns.  See the logs for more information. 
FATAL  date/time - aborting: original exit_code = 2 
FATAL  date/time- aborting: normalized exit_code = 2 
DEBUG  date/time- SHUTDOWN REQUESTED 
DEBUG  date/time - (X) commiting registry 
DEBUG  date/time - (X) shutting down service manager 
DEBUG date/time- (X) cleaning up temporary directories 
DEBUG  date/time - Exiting with exit code: 2 
DEBUG  date/time - cleanUp() 
DEBUG  date/time - calling cleanUpWin32() 

• Run the command AddColumns -u -s from Windchill shell and upgrade_tool.log reports following error

javax.naming.CommunicationException: wcdev.windchill.com:389 [Root exception is java.net.ConnectException: Connection refused: connect]
at com.sun.jndi.ldap.Connection.<init>(Connection.java:238)
at com.sun.jndi.ldap.LdapClient.<init>(LdapClient.java:137)
at com.sun.jndi.ldap.LdapClient.getInstance(LdapClient.java:1609)
Caused by: java.net.ConnectException: Connection refused: connect