Oracle Client Software Version 8.1.7
I have a web site that I developed on Vista using Vb.net9. It makes a connection to Oracle.
For the connection I use System.Data.OracleClient. It works fine on my machine, and our test server, but it does not work on the production server. We installed the Oracle Client 11 on the server. The error is System.Data.OracleClient requires Oracle client software version 8.1.7 We've tried, making a console app that opens the connection, connection runs fine, opens, displays a message and all is well there. Then we make a simple web form, put it in the directory of the program, just a button, opens the connection, try.catch, grabs error, same error. The console app was running under an Administrator, web site running under iwam.
Is it possible that iwam has a different path? I've run into this error dozens of times: Cause Security permissions were not properly set when the Oracle client was installed on Windows with NTFS. The result of this is that content of the ORACLEHOME directory is not visible to Authenticated Users on the machine; this causes an error while the System.Data.OracleClient is communicating with the Oracle Connectivity software from ASP.NET using Authenticated User privileges. Solution To fix the problem you have to give the Authenticated Users group privilege to the Oracle Home directory. Log on to Windows as a user with Administrator privileges. Start Window Explorer and navigate to the ORACLEHOME folder.
Choose properties on the ORACLEHOME folder. Click the “Security” tab of the “Properties” window. Click on “Authenticated Users” item in the “Name” list. Un-check the “Read and Execute” box in the “Permissions” list under the “Allow” column. Re-check the “Read and Execute” box under the “Allow” column.
Click the “Advanced” button and in the “Permission Entries” verify that “Authenticated Users” are listed with permission = “Read & Execute”, and Apply To = “This folder, subfolders and files”. If not, edit that line and make sure that “Apply To” drop-down box is set to “This folder, subfolders and files”. This should already be set properly but it is important that you verify it. Click the “Ok” button until you close out all of the security properties windows.
Requires Oracle Client Software Version 8.1.7
But, on running the application from com2 i get following error: 'System.Data.OracleClient requires Oracle client software version 8.1.7 or greater'.
The cursor may present the hour glass for a few seconds as it applies the permissions you just changed to all subfolders and files. Reboot, to assure that the changes have taken effect. Try your application again. For me, the issue was some plugin in my Visual Studio started forcing my application into x64 64bit mode, so the Oracle driver wasn't being found as I had Oracle 32bit installed.
So if you are having this issue, try running Visual Studio in safemode (devenv /safemode). I could find that it was looking in SYSWOW64 for the ic.dll file by using the ProcMon app by SysInternals/Microsoft. Update: For me it was the Telerik JustTrace product that was causing the issue, it was probably hooking in and affecting the runtime version somehow to do tracing. Aerofly fs 2. Update2: It's not just JustTrace causing an issue, JustMock is causing the same processor mode issue.
JustMock is easier to fix though: Click JustMock- Disable Profiler and then my web app's oracle driver runs in the correct CPU mode. This might be fixed by Telerik in the future.