After upgrading to JADE 6.2.15 from 6.1 or any 6.2 releases, users may encounter a 1310 unhandled exception when loading schemas if those schemas have exposures for Web services, C-API, or Java.
To avoid this, users should apply hot fix 6.2.15.021 as part of the 6.2.15 upgrade, or immediately after upgrading and before loading the first user schema.
A workaround in lieu of having the hot fix is to run the JADE Logical Certifier for meta data after upgrading. It will produce a .FIX file that includes fixes for the JadeExposedClass class. Running the repair process with this .FIX file will also correct the issue.