ORA-01719: outer join operator (_) not allowed in operand of OR or IN

[gang99]

My PL/SQL Developer was working fine with Oracle 11g, But when I connect to Oracle 19c, it keeps popping up an error window saying "ORA-01719: outer join operator (+) not allowed in operand of OR or IN" as soon as I click the result pane, no matter what SQL query executed. It's kind of annoying. After I click OK, it will allow me to continue. Any suggestions how to avoid this?

 

[fabrice]

A bug has been found in 19c BDD, i don't know if a patch exist.
One oracle page said :

While the bug is still being worked on, please use following workaround:
alter system set "_fix_control" = '28012754:0';