I am running into peculiar issue. I am developing a windows based application which connects to Oracle database.
For initial testings, I have created installer and tested on different machines that I have. Each machine has Oracle Client installed and I did not see any problem in running application.
But when I share this installer with customer, he is getting error "Unable to load DLL OraOps10.dll". When asked he mentioned and has shown the Oracle Client installed on his machine and he is able to run other C# applications which connects to Oracle databases.
I do not understand why my application only getting above error. I even tried suggestions shared at https://forums.oracle.com/forums/thread.jspa?threadID=67364 but still no luck.
I even tried copying executables & DLLs manually on customer's machine. But still facing same issue.
So please help me on what else i can do.
Thanks & Best Regards
Sudhakar Chavali
P.S:
I am using Windows XP operating system and customer is also using same operating system. Both machines are of type 32 bit OS only.
This is the location where customer's oracle client installed:
C:\oracle\product\10.2.0\client_1\bin and same is the version in my case too.
We both are using Oracle 10g.
The ODP.NET drivers basically consist of two parts. The .NET part and the native OCI part. The error message indicates that the .NET part is working but fails to load the native part.
These issue are likely causes:
There's a version mismatch between the .NET part and the native part. Note that OraOps10.dll belongs to Oracle 10g. So the .NET part isobviously of version 10, and it is looking for a native part for version 10.
There could be a bitness mismatch. If the .NET part is running in 64 bit mode, it'll be looking for the 64 bit native OCI DLLs. On a 64 bit system, the task manager can tell you whether the process is 32 or 64 bit. 32 bit processes are marked with *32.
The registry might not contain the correct path to the native DLLs. ODP.NET will retrieve the value of HKEY_LOCAL_MACHINE\Software\Oracle\ODP.NET\2.xxx.x.x\DllPath to locate the OCI DLLs. Note that the registry is split into a 32 and 64 bit part. Depending on the process looking into the registry, it'll get different values.
It's best if you add all the available information to your question. Is it a 64 bit operating system? Is it a 32 or 64 bit process? Which version of the Oracle client was installed? What directory was the Oracle client installed? Can you see the correct registry entries?
As for me, I am getting Unable to load DLL "OraOps12.dll" error message.
It is a web application, and I am using Oracle XE. Both the web application (the client app) and the Oracle XE database server is installed on the same machine.
The Oracle XE database server comes with its own Oracle 11 client, but the ASP.NET MVC web app is using Oracle 12 client. Even though I installed Oracle 12 instant client on the machine, the ASP.NET MVC website could not see it, it keeps complaining "Unable to load DLL OraOps12.dll".
What I had to do was edit the registry at HKLM\Software\Oracle\ODP.NET\DllPath to point to the Oracle 12 instant client instead of the Oracle 11 client that gets installed with the Oracle XE.
I will post a more detailed explanation later once I am free.
I suspect that either the entire Oracle client was not installed OR an earlier version was installed.
You should have the customer verify that the version of the Oracle client that is installed matches yours and that the entire client, not just the .Net portion, was installed.
Can you throw some more light on this issue like whether the target OS is 32 or 64 bit. Try to generate the x86 and 64bit installers and check with your clients machine. If not the Oracle client may not be properly installed in the client pc. These issues are a little bit tricky to handle. Try to look at it in other directions.
Related
I need to connect to a oracle database on another server so I don't have acces to the database itself.
I created an application in c# with winforms and I was able use this database when I changed some settings in the build options.
Now I am translating the application into a asp.net website and I got this error:
'Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed.'
This is the same error as what I received when I used winforms but then It was possible to fix it in the build options.
Is it possible to fix this error without having acces to the server where the database is stored?
This has nothing to do with the database server version. It's the version of the client components/Oracle driver that you have installed on the web server and whether your web app is running in 32/64 bit mode. You need to make sure they are consistent (ie 32 bit app uses 32 bit driver, 64 bit app use 64 bit driver). Check the Enable 32-bit applications setting in your IIS app pool advanced settings.
I have designed a C# application to connect to Oracle Database and change schema users passwords. My reference assembly is System.Data.OracleClient from the location: "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.Data.OracleClient.dll"
The platform that I used to design/test the application looks like this:
1. 64 bit Windows 7 platform.
2. 32 bit .Net Frameworkv4.5
3. 32 bit Oracle 10g Client.
I need this application to run for 64 bit Oracle Client too. But when I transfer my binaries to a machine which has 64 bit Oracle 11g installed, I get this error: "Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed."
I am not sure how to work around this issue. Please suggest if I need to make any code changes or assembly reference. I read through a lot of similar forums but could not find anything helpful. Please help!
First of all, provider System.Data.OracleClient is deprecated. Microsoft is not supporting it anymore, you should consider to use the Oracle provider Oracle.DataAccess or Oracle.ManagedDataAccess.
My recommondation is to install both, 32-bit and 64-bit Oracle Client on your developing machine, then you can test and build anything. Here is an instruction how to do this: Install x86 and x64 Oracle Client on one machine
An x86 Oracle client can connect to a 64 bit Oracle Database, vice versa is also no problem.
I had the same issue on a Windows 10 PC. I copied the project from my old computer to the new one, both 64 bits, and I installed the Oracle Client 64 bit on the new machine. I got the same error message, but after trying many solutions to no effect, what actually worked for me was this:
In your Visual Studio (mine is 2017) go to
Tools > Options > Projects and Solutions > Web Projects
On that page, check the option that says: Use the 64 bit version of IIS Express for Websites and Projects
Try this:
Open Oracle Net Configuration Assistant
Select radio button option at Local Net Service Name Configuration, then click Next
Select radio button option at Reconfigure, then click next
Select net service name you want to reconfigure, either ORACLR_CONNECTION_DATA or ORCL, then click Next
input your Service Name, if your service name of installed oracle as ORCL, then write ORCL to the field, then click Next
select the protocol you want to use, for example, select TCP, then click Next
input hostname where your oracle database engine (service) installed, for example, installed on your desktop or notebook,
then fill as localhost, and fill your port number (select option Use the Standar port number of 1521) or if use other port, fill the port number
Then click next.
select Yes perform test,
if necessary, change user logon
then click next
if no configure another net service name, select No and then click next
you should download, extract and install the ODTwithODAC183.zip and BuildTools_Full.exe if you want use to connect on .net framework from MS Visual Studio
I'm trying to open a connection to Oracle from c#.
I've seen this error a couple of times on the forums with possible solutions. And these solutions did help me - for a WinForm app.
However, if I take my same coding (that works in WinForms) and I put into an ASP.net application, I get the error in the title.
The command that generates this is:
OracleConnection oc = new OracleConnection(ConnectionString);
Additional information:
I have a reference to Oracle.DataAccess (version 2.111.6.20)
I've copied the required dll's to my bin directory (oci.dll, ociw32.dll, orannzsbb11.dll, oraocci11.dll, oraociicus11.dll, OraOps11w.dll).
These are the same DLL's that are working in WinForms.
This error mostly comes due to the incompatible processor architecture(32bit or 64) of the application and the Oracle ODAC dll that you have added as reference. It might work in the client app but not in the web app because you might be running the Asp.net application in incompatible bit version 32 or 64.
In case if you have hosted the site in IIS you will have to check the bit version IIS is configured to run.
EDIT
If the above solution didnt solve your issue, Check if you have Oracle Client installed in your machine. Some database operations needs at least Oracle Client installation(Oracle Express or Enterprise etc). Not having the installation might throw the same exception.
I installed windows-7 64 bit. When I try to run my program (that works with Oracle 11g) I get this error:
Attempt to load Oracle client libraries threw BadImageFormatException
this problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed
What can be the problem ? Where I can download 64 bit oracle client ?
(can I get any link for download)
thanks in advance
Have you tried download the 64bit Oracle Client from:
http://www.oracle.com/technetwork/database/enterprise-edition/downloads/112010-win64soft-094461.htmlBlockquote
This looks like it might be the correct download:
Oracle Database 11g Release 2 Client (11.2.0.1.0) for Microsoft Windows (x64)
win64_11gR2_client.zip (615,698,264 bytes) (cksum - 2947608743)
Contains the Oracle Client Libraries. Download if you want the client libraries only
Alternatively, if you cannot obtain a 64 bit version of the Oracle client and are stuck with the 32 bit version, then you can either:
rebuild your .NET application to
only run as a 32 bit (x86) process
instead of "Any CPU" or
use CorFlags.exe (CorFlags
Conversion Tool) to reconfigure
your existing .NET application exe
to run as 32 bit without having to
rebuild it.
I'm trying to get a firebird web application (IIS6 64 bit) to run. However I'm getting bad image format (bit difference incompatability) issues. Has anyone got any advice to get it running.
Details AnyCPU application references the .net firebird driver (through nhibernate) which uses a native 64bit dll. There is a native 32bit dll which I use for local development and it works fine. (I havn't got the 32 version working on the 64 bit server either).
This issue actually formed from how we deployed our website. The site is packaged on a 32bit computer what I didn't realize is that it also packed the 32bit native fire-bird dll's instead of the 64bit ones.