The error code -204 says:
The object name is undefined. Resolution is need to check if the DB2 object name is correct.
|-204||Check object name|
|-205||Check column name|
|-206||Check object names|
The error code -205 says:
Invalid column name. In other way, the column name is not defined on that table. Resolution is check if that column name is created during Table creation.
The error code -206 says:
Similar to error -204, the column name is invalid in the context of SELECT, INSERT, DELETE or MERGE