fixing ORA-12154 after making oraoledb appear
I had to replace a hard drive, reinstall win 7, reinstall Delphi XE2, Interbase, and reinstall the Oracle client. Done. Delphi runs perfectly using Interbase. The first major problem was when using an ADO Connection, when I went to build the connect string, there was no option to select "ORACLE Provider for OLEDB" . I checked after the Oracle client installation (done 3 times), and the path was set, the ORAOLEDB10US.DLL and several similarly named dlls were in the path. I kept thinking there must be a way to tell delphi where the oledb choices are located, but I found a solution that makes no sense but it worked. I am running Oracle personal on a different pc. I then installed ORACLE11 XE from a 5 year old or older CD I have on the Delphi PC, and after the installation, Delphi now offers "Oracle provider for oledb" as a choice when building the connection string. I then tried to write programs that could connect to either Oracle - the OracleXE on the same PC, or Oracle Personal on another machine. Here comes the mystery: When I build a connection string in Delphi and click the TEST button it always fails with ORA-12154. I searched the web and found a lot of people have this problem and I did not find anything useful. I spent a lot of time changing the tnsnames.ora file, but not my connection string with fail the test on either Oracle. Then I discovered the fix for me - I found that after building the connection string, and even after the test of it fails with ORA-12154, if I run the program after compiling it, it works. This works for either Oracle. Does anyone have an explanation of this - an ADOCONNECTION that fails in the IDE when using the "TEST" button when building the string, but then works fine if you compile it and run the EXE file? And any explanation on why Delphi did not see the Oracle Provider for OLEDB even after several installations of Oracle Client, yet it started working after installing Oracle XE? I hope that this info is useful for others who may be stuck for days like I was. Everything seems to be running fine for me, but I still would like to understand why.
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steve
6/22/2015 5:04:57 AM
embarcadero.delphi.ado
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