Problems using the .NET transactionscope with DB2 on a 64 bit machine

To solve the growing need for more memory, we decided to upgrade all our development machines to a 64bit OS. Although this allows us to install and use more memory on our machines, it also introduces a whole list of new problems.

One of them was regarding the usage of the .NET transactionscope in combination with DB2. In DB2 managing your transactions through the transactionscope will immediatelly involve the DTC coordinator. However the moment the DTC tries to open a transaction, it fails with the following error message:

The XA Transaction Manager attempted to load the XA resource manager DLL. The call to LOADLIBRARY for the XA resource manager DLL failed: DLL=C:\Program Files\IBM\SQLLIB\BIN\DB2APP.DLL, HR=0x800700c1, File=d:\w7rtm\com\complus\dtc\dtc\xatm\src\xarmconn.cpp Line=2446.

After trying almost every possible solution, we finally found a solution that worked for us. When installing the DB2 client, it doesn’t correctly register the 64bit dll’s in the register.

The following registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSDTC\XADLL incorrectly referenced the db2app.dll instead of the db2app64.dll. As a consequence the MSDTC tries to load a 32bit DLL on 64bit machine, which fails. After changing the reference to the 64bit dll everything worked.

More information in this thread on the DB2 forums.

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.

Kubernetes–Limit your environmental impact

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As a developer there are a lot of small tasks you need to do as part of your coding, debugging and testing activities. DevToys is an offline windows app that tries to help you with these tasks. Instead of using different websites you get a fully offline experience offering help for a large list of tasks. Many tools are available. Here is the current list: Converters JSON <> YAML Timestamp Number Base Cron Parser Encoders / Decoders HTML URL Base64 Text & Image GZip JWT Decoder Formatters JSON SQL XML Generators Hash (MD5, SHA1, SHA256, SHA512) UUID 1 and 4 Lorem Ipsum Checksum Text Escape / Unescape Inspector & Case Converter Regex Tester Text Comparer XML Validator Markdown Preview Graphic Color B

The art of simplicity

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