ERROR_BAD_FORMAT: Background

The error An attempt was made to load a program with an incorrect format is quite a mysterious error code. There is not much information about it, except for various forum posts where users describe the problem. The ERROR_BAD_FORMAT error code affects mainly Windows 7 machines, but sometimes it can also occur on Windows 10. It usually occurs when users try to launch an app or program on their Windows PCs or servers. Error code 11 is often triggered by VS Redistributable package issues, incompatibility problems between programs, incorrect registry changes, etc.

How to fix error 10: ERROR_BAD_FORMAT

ERROR_BAD_FORMAT on .NET platforms

Solution 1 — Enable 32-bit compatibility Users report that this error mainly occurs due to DLL incompatibility issues triggered by apps running in Visual Studio installed on 64-bit operating systems with the value TargetCPU = Any CPU. In other words, apps try to load DLLs built for 32-bit platforms on x64 computers, and vice versa. To fix this problem, you need to configure the utility to run as a 32-bit .NET process using CORFLAGS. You can also enable 32-bit compatibility in the Windows form application. Simply right-click on Project > go to Properties > Build > check Prefer 32-bit. Additionally, you can also use the Any CPU option, and use a dedicated code to identify which DLL to use. In this manner, you will use one assembly to handle both 32-bit and 64-bit platforms. Here is the code to use: if (Environment.Is64BitProcess){ //call MiniDumpWriteDump}else{ //call MiniDumpWriteDumpX86} You can also use preprocessor conditions, but in this case you need to compile two different assemblies. In other words, compile a 32-bit assembly for 32-bit platforms, and a separate 64-bit assembly for 64-bit platforms. Solution 2 — Install the correct VS Redistributable Package Your target PC might not have the appropriate VS Redistributable Package installed. Go to Microsoft’s webpage and install the appropriate VS Redistributable Package version on your system.

Fix ERROR_BAD_FORMAT on Windows 10

On Windows 10, the An attempt was made to load a program with an incorrect format error usually occurs on startup and is due to software incompatibility issues. Users confirm that this problem often occurs when using Start Menu replacement tools. If you’re using a Windows 10 Start menu replacement, uninstall it and that should do the trick. Also, don’t forget to repair your registry. You can use Microsoft’s System File Checker to check for system file corruption. Here’s how to run an SFC scan:

  1. Go to Start > type cmd > right-click Command Prompt > select Run as Administrator
  2. Now type the sfc /scannow command
  3. Wait for the scanning process to complete and then restart your computer. All corrupted files will be replaced on reboot. We hope that the solutions listed above helped you fix the  ERROR_BAD_FORMAT error code 11. As always, if you’ve come across other solutions to fix this problem, you can list the troubleshooting steps in the comments below. A reliable automated tool can help you achieve this and keep your device safe beyond standard security updates. ⇒ Get Restoro

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