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Protocol Violation Message In SQL Developer Worksheet when using with an Oracle Gateway (DG4ODBC, DG4MSQL, DG4SYBS, DG4DRDA) (Doc ID 1434413.1)

Last updated on OCTOBER 24, 2019

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


When selecting with SQL Developer and an Oracle Gateway like Database Gateway for ODBC (=DG4ODBC), Database Gateway for MS SQL Server (=DG4MSQL), Database Gateway for Sybase (=DG4SYBS) or Database Gateway for DRDA (=DG4DRDA) from a remote foreign database table SQL Developer 3.1 fails with error:
Error: Protocol violation
SQLState: 99999
ErrorCode: 17401

Testing the same select in SQL*Plus is working fine.


Updating SQL developer from 3.0 to 3.1


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