Running into DB connection issues between PowerBuilder and OCI can be tricky—usually it's a config mismatch, missing drivers, or network/firewall restrictions. Double-check your connection string, ensure the Oracle client is properly set up, and that any required DLLs are accessible to PowerBuilder.

Honestly, debugging this feels like optimizing a build in Path of Building—so many dependencies and one wrong setting can throw everything off. Once it's all wired correctly though, it runs smooth.