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ORA-28040 No Matching Authentication Protocol Oracle 12c

edited Jul 15, 2019 8:03AM in Windows Oracle Data Access Components (MOSC) 3 commentsAnswered

I have a 32 bit application I need to communicate with a Oracle 12c database. This has worked everyday for 20 years all the way from Oracle 7 thru Oracle 12

Last Thursday when I connected I get "ORA-28040 No Matching Authentication Protocol"

I have installed 32bit Oracle Client 12c on windows box where app runs. After setting up the ODBC driver I get the "ORA-28040 No Matching Authentication Protocol" just doing a test connect.

There is a Organization 64 bit Client that DOES NOT GIVE ME this error and seems to pass data using sqlplus but my 32 bit app shows "Mismatch between application and Database"

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