In WebAFIS log during startup:

Unable to load application: OCIError: ORA-00001: unique constraint (%s.%s) violated rake aborted! OCIError: ORA-00001: unique constraint (%s.%s) violated

The problem was that the database was returning additional information about password expiration date and that was crashing the driver. Reseting the password fixed the problem.

From: https://stackoverflow.com/questions/31112102/oracle-occi-connection-pool-reports-ora-00001-unique-constraint-s-s-violate/57692832#57692832

Relevant ABIS version: Any