Select erfor : OCI7 mode used - OCI8 required

[Henning]

After upgrade from XE18 to XE21 select including LOB fails.
Error : OCI7 mode used select required OCI8

Pl/SQL version is 13

 

[Marco Kalter]

PL/SQL Developer 13 is not compatible with Oracle Server 21. You will need to upgrade to version 14.0.