Cannot load the DLL "OraOps10.dll"

Question

I am facing a particular problem. I am developing a Windows-based application that connects to an Oracle database.

For the initial tests, I created an installer and tested it on different machines that I have. Oracle Client is installed on each machine, and I do not see any problems when starting the application.

But when I share this installer with the client, it gets the error "Unable to load OraOps10.dll DLL". When asked, he mentioned and showed that the Oracle client is installed on his machine, and he can run other C # applications that connect to Oracle databases.

I do not understand why my application only gets the error above. I even tried the suggestions shared by https://forums.oracle.com/forums/thread.jspa?threadID=67364 , but still no luck.

I even tried to copy executables and DLLs manually on the client machine. But still facing the same question.

So help me, what else can I do.

Thanks and best regards
Sudhakar Chawali

PS:

I use the Windows XP operating system, and the client also uses the same operating system. Both machines have only 32-bit type OS.

This is where the oracle client client is installed: C: \ oracle \ product \ 10.2.0 \ client_1 \ bin, and this is also the version in my case.

We both use Oracle 10g.

Answer 1

ODP.NET drivers consist mainly of two parts. Part .NET and native part of OCI. The error message indicates that the .NET part is working, but not loading its own part.

These problems are likely causes:

• There is a version mismatch between the .NET part and the original part. Please note that OraOps10.dll belongs to Oracle 10g. Thus, the .NET part obviously refers to version 10, and it is looking for a native part for version 10.

• There may be bit mismatch. If the .NET part is running in 64-bit mode, it will look for 64-bit native OCI DLL files. On a 64-bit system, the task manager can tell you whether the process is 32 or 64 bit. 32-bit processes are marked *32 .

• The registry may not have the correct path to the native DLL. ODP.NET will retrieve the value HKEY_LOCAL_MACHINE\Software\Oracle\ODP.NET\2.xxx.xx\DllPath to search for OCI DLL files. Please note that the registry is divided into 32 and 64-bit parts. Depending on the process viewing the registry, it will receive different values.

Best if you add all available information to your question. Is it a 64-bit operating system? Is this a 32 or 64 bit process? What version of Oracle client was installed? In which directory was the Oracle client installed? Can you see the correct registry entries?

Answer 2

For me, I get the Unable to load DLL "OraOps12.dll" error Unable to load DLL "OraOps12.dll" .

This is a web application and I am using Oracle XE. Both a web application (client application) and an Oracle XE database server are installed on one computer.

The Oracle XE database server comes with its Oracle 11 client, but the ASP.NET MVC web application uses the Oracle 12 client. Although I installed the Oracle 12 instant client on the computer, the ASP.NET MVC website was not able to see it , he continues to complain "Unable to load OraOps12.dll DLL".

I needed to edit the registry on HKLM\Software\Oracle\ODP.NET\DllPath to point to the instant Oracle 12 client instead of the Oracle 11 client that is installed with Oracle XE.

I will post a more detailed explanation later when I am free.

Answer 3

I suspect that either the entire Oracle client was not installed, or an earlier version was installed.

The client must ensure that the version of the Oracle client you installed matches yours, and that the entire client has been installed, not just the .Net part.

Answer 4

Can you talk about this problem, for example, about whether the target OS is 32 or 64 bit. Try to create x86 and 64-bit installers and test clients using your machine. If the Oracle client client cannot be correctly installed on the client PC. These problems are a little difficult to manage. Try to look at it in other directions.