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I have a working code that integrates with Access runtime 32bit reading an Excel file. I removed the version, and installed the Access runtime version instead. Also, using Microsoft. Excel version Also, changed connection string to be Microsoft. Getting error message. Due to the changes in the Access runtime and office Click to run installs?

Well all of office now typical runs as a virtualized application. What this means is that now when you install the Access runtime, it does not expose an instance of the ACE database engine. And as noted for C2R installs of Access or the run-time , you will find that ACE is not exposed and registered anyway. Make sure you grab the x32 bit version if you are forcing your. Also, last but not least, while your ACE. You as a general rule should find that.

For , it quite much always the case ACE not exposed. So, install the ACE. It also much smaller then the whole run-time, and thus that's a bonus if you actually don't need Access run-time, but just need ACE. In addition to having to install ACE separate now in most cases , you find that using. I would test if ACE is installed and working. I have a sample.

You don't need nor does it help to use the office interop assemblies, since you using the ACE provider for this. The inter-op does not provide use of office, only a set of references for your convenience. The above zip file has two samples - run them both and you know what version of ACE you have installed and working.

To open and later Excel files? Well keep in mind that Excel files save their data as xml so do all offce documents - if you rename the xlsx extension as zip, you can now open any office document as a xml file. Anyway, the connection string will look like this for REAL format files and later - note the use of xml tag. We found out that the problem is a known issue in a multi-threaded environment, and currently there is no solution. It's probably best to just move on to a newer solution, since this is an old way of accessing Excel files.

The reason why everybody has trouble using the 64 Bit version of the ACE Oledb driver is because, you have to explicitly put the outout to 64Bit when you compile your app! Stack Overflow for Teams — Start collaborating and sharing organizational knowledge.

Create a free Team Why Teams? Learn more. Asked 2 years, 5 months ago. Modified 8 days ago. Viewed 7k times. Getting error message The 'Microsoft. Improve this question. Frank Robinson. Frank Robinson Frank Robinson 21 1 1 silver badge 5 5 bronze badges. ACE comes with Microsoft Office. Ace is adodb. I've have never gotten the runtime to work but others have. It should be part of the Interop. It may be in a different folder if you have a different version of office loaded.

And Office ships Microsoft. I have adodb. I installed office x64, and AccessDatabaseEngine redistribute X64, and changed the connection string to be 16 instead of 15, still gets same error message, only now with 'Microsoft.

Add a comment. Sorted by: Reset to default. Highest score default Date modified newest first Date created oldest first. So, you have to install the ACE data engine separate now.

Edit I would test if ACE is installed and working. Edit 2 To open and later Excel files? Rows 0. Improve this answer. Community Bot 1 1 1 silver badge. Albert D. Kallal Albert D.

Kallal Thanks for the detailed answer. Unfortunately it did not solve my problem. When I'm runnign the code with: Microsoft. Also, I tried both x86 and x64 versions of office and the Redistributable you gave a link to. I have a feeling there's something wrong with the connection string, Do you have any suggestions on how to write it properly?

My app is running in 32 bit, I checked it now. And that means you must set your. Since the very first Atari computer came out, you NEVER been able to mix and match x8 bit software with say x16 bit software. Same goes here, you never could mix and match the bit size of your executable code libraries you are running with different size bit systems. You have force and set your project to run as x64 then. Keep in mind that anytime you use the VS connection builders they will fail on the "test connection" since VS is x32 bits.

However when running your project even debug , then it should work. Of course tossing in Excel further complicates this issue. Show 3 more comments. Greetz Andy. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.

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