It looks like whichever program or process you're trying to initialize either isn't installed on your machine, has a damaged installation or needs to be registered.
Either install it, repair it (via Add/Remove Programs) or register it (via Regsvr32.exe).
You haven't provided enough information for us to help you any more than this.
My problem and the solution
I have a 32 bit third party dll which i have installed in 2008 R2 machine which is 64 bit.
I have a wcf service created in .net 4.5 framework which calls the 32 bit third party dll for process. Now i have build property set to target 'any' cpu and deployed it to the 64 bit machine.
when i tried to invoke the wcf service got error "80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG"
Now i used ProcMon.exe to trace the com registry issue and identified that the process is looking for the registry entry at HKLM\CLSID and HKCR\CLSID where there is no entry.
Came to know that Microsoft will not register the 32 bit com components to the paths HKLM\CLSID, HKCR\CLSID in 64 bit machine rather it places the entry in HKLM\Wow6432Node\CLSID and HKCR\Wow6432Node\CLSID paths.
Now the conflict is 64 bit process trying to invoke 32 bit process in 64 bit machine which will look for the registry entry in HKLM\CLSID, HKCR\CLSID. The solution is we have to force the 64 bit process to look at the registry entry at HKLM\Wow6432Node\CLSID and HKCR\Wow6432Node\CLSID.
This can be achieved by configuring the wcf service project properties to target to 'X86' machine instead of 'Any'.
After deploying the 'X86' version to the 2008 R2 server got the issue "System.BadImageFormatException: Could not load file or assembly"
Solution to this badimageformatexception is setting the 'Enable32bitApplications' to 'True' in IIS Apppool properties for the right apppool.
Also note that the class context when initializing can create that exception. If you have an object which is coded as INPROC_SERVER but you try to CoCreateInstance as CLSCTX_LOCAL_SERVER, you will also get that error.
You need to ensure the object is registered and the CoCreateInstance is creating an instance with the correct class context.
The way that I resolved this issue was to register the
ensure that the COM you are invoking is registered.
My application was using
xceedcry.dll and I was not registering it. Once I registered it, the application worked fine.
I had the same issue using MapWinGis. I found the solution, working on visual studio 2015 windows forms proyect, just right click on the proyect-> properties-> Build, set configuration to All configurations and in the conbobox "platform target" set it to x64.
I ran into this issue calling a .Net assembly from a C++ client via COM. It turns out that one of the assemblies the .Net assembly depended on could not be found. I wrestled for a while trying to figure out what was wrong with the 1st assembly, but it was actually one of the 1st assembly's dependencies. I received two different errors when calling CoCreateInstance() from the C++ client. The first was: REGDB_E_CLASSNOTREG Class not registered And the second try was: 0x80131040 : The located assembly's manifest definition does not match the assembly reference.
So check that your assembly's references are present. I discovered this by browsing the 1st assembly with dotPeek and noticing one of it's references was missing. Placing the correct version of the dependency in the folder resolved both errors.
I ran into the same issue using a COM class, i.e. 'Class not registered exception' at runtime. For me I was able to resolve by going to the app.config file and change the 'startup' and 'supportedRuntime' elements to something like:
<configuration> <startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.0"/> </startup> </configuration>
You can read more about the details here http://stackoverflow.com/questions/1604663/
I should note I am running Visual Studio 2017. Target cpu = x86 Embed Interop Type = true (in the properties window)
In my case the class was registered properly and built in ANY CPU / 64 bit mode.
But the Enable 32-bit Applications property of the IIS Application pool of the application which uses the class was set to True.
Class was not found because of the architecture mismatch between the application pool configuration and the actual registered class.
I have faced the same issue. After done some research i found fix for me and it may useful. The issue is not only related to re-installation as of my observation, it depends on access permissions also.
Step 1: Repair the particular COM object.
Step 2: Component Services > Computers > My Computer > DCOM Config > Select your COM object > Right click > Properties > Security tab > Access Permissions > Choose Customize > Click EDIT > Select IIS_USER (If not exists create with complete rights) and give complete access and click OK.
Move to Identity tab > You can select "Interactive user" or "This user" > Click Apply and OK. If you choose "This user", we have to give Administrative privileged user to that server
Step 3: Open IIS Manager > Restart the Application Pools.
Note: If required please restart the server
Here find the solution, run mmc -32 tool (not dcomcfg)
On 64 bit system with 32 bit Office try this:
Start Run mmc -32 File Add Remove Snap-in Component Services Add OK Console Root Component Services Computers My Computer DCOM Config Microsoft Excel Application
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