While upgrading a client from 9.4 to 10.1 gateway and also OTK from 4.4 to 4.6.2. an error with JDBC Query cannot insert NULL into TOKEN_RANK was observed.
Environment
Gateway 10.1, OTK 4.6.2
Resolution
The OTK 4.6.2 doesn't work for Gateway 10.1. OTK 4.5 works for 10.1.