Dear All, I am getting the following error during running the command "ant fresh_install", installing the source from GIt. [java] Caused by: org.flywaydb.core.api.FlywayException: This PostgreSQL Database is INCOMPATIBLE with DSpace. The upgrade will NOT proceed. A supported version (>=1.1) of the 'pgcrypto' extension must be installed! Please run 'dspace database info' for additional info/tips. [java] at org.dspace.storage.rdbms.PostgreSQLCryptoChecker.checkPgCrypto(PostgreSQLCryptoChecker.java:60) [java] at org.dspace.storage.rdbms.PostgreSQLCryptoChecker.beforeBaseline(PostgreSQLCryptoChecker.java:162) [java] at org.flywaydb.core.internal.command.DbBaseline$1.doInTransaction(DbBaseline.java:89) [java] at org.flywaydb.core.internal.util.jdbc.TransactionTemplate.execute(TransactionTemplate.java:72) [java] at org.flywaydb.core.internal.command.DbBaseline.baseline(DbBaseline.java:85) [java] at org.flywaydb.core.Flyway$5.execute(Flyway.java:1186) [java] at org.flywaydb.core.Flyway$5.execute(Flyway.java:1182) [java] at org.flywaydb.core.Flyway.execute(Flyway.java:1418) [java] at org.flywaydb.core.Flyway.baseline(Flyway.java:1182) [java] at org.dspace.storage.rdbms.DatabaseUtils.updateDatabase(DatabaseUtils.java:535) [java] ... 8 more [java] 2016-06-01 23:11:53,672 INFO org.dspace.services.sessions.SessionRequestServiceImpl @ shutdown [java] 2016-06-01 23:11:53,674 WARN org.dspace.services.sessions.SessionRequestServiceImpl @ Request interceptor (org.dspace.services.events.SystemEventService$EventRequestInterceptor@53f3521) failed to execute on end (request-715-1464802913118): null [java] 2016-06-01 23:11:53,700 INFO org.dspace.servicemanager.spring.SpringServiceManager @ Spring Service Manager Shutdown... [java] 2016-06-01 23:11:53,700 INFO org.dspace.servicemanager.DSpaceServiceManager @ Shutdown DSpace core service manager [java] 2016-06-01 23:11:53,700 INFO org.dspace.servicemanager.DSpaceKernelImpl @ DSpace kernel shutdown completed and unregistered MBean: org.dspace:name=1f445fc0-046a-4a64-af5e-11f7125c71bc,type=DSpaceKernel BUILD FAILED /dspace/DSpace/dspace/target/dspace-installer/build.xml:802: Java returned: 1 What are the errors, i am unable to find out help me to find out the solution. With regards, Vijay Kumar