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Can't connect Oracle10g using PL/SQL Developer on Windows 8 64 bit

Installed Oracle10g and DesignerSuite on Windows8 64 bit. Cant connect, ORA-12154 could not resolve the connect identifier specified. tnsnames.ora is from working PC, command window tnsping works AOK. Please help.
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8/22/2022 - Mon
Gerwin Jansen

Can you try another connection type instead of TNS in sql developer?

Can you connect using sqlplus?

My apologies, the only way I have ever connected is using PL/SQL Developer with tnsnames.ora, do you have dummy instructions?

sqlplus -> The procedure entry point longjmp could not be located in the dynamic link library D:\app\Bill\product\11.2.0\dbhome_1\bin\oracore11.dll
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I will download Oracle11, and try that. If I do not file Windows 8 in file 13.. Thank you all for your help.

Best Regards,