Column with NVARCHAR(4000) not appearing in Resultset using DG4MSQL

Problem:
On SQL Server side a table had a column (desc_details) with NVARCHAR(4000), DG4MSQL has been configured for communication with SQL Server. Querying to that table was not showing the column (desc_details) but all other columns were being shown correctly.

12c: Database Resident Connection Pooling

Database Resident Connection Pooling (DRCP) provides a connection pool in the database server for typical Web application usage scenarios. It complements middle-tier connection pools that share connections between threads in a middle-tier process. DRCP is relevant for architectures with multi-process single threaded application servers (such as PHP/Apache) that cannot perform middle-tier connection pooling. DRCP is available to clients that use the OCI driver with C, C++, and PHP.