Hi,
using PLSQL Developer 7.1.5.1398 appears the error message "A TLOBLocator instance requires OCI8 mode, but OCI7 mode is used" when I query a table with a CLOB column in a 21c database.
I try to check "Force OCI7 mode on OCI8" option but then I can't connect. The error: "invalid login or...