try with db2jcc4.jar and the error is:   An attempt was made to access a database, MMSP4LIB, which was either not found or does not support transactions. ERRORCODE=-4499, SQLSTATE=08004); routing to failure: org.apache.nifi.processor.exception.ProcessException: java.sql.SQLException: Cannot create PoolableConnectionFactory ([jcc][t4][2057][11264][4.25.13] The application server rejected establishment of the connection.   ... View more