CODEWITHSUNDEEP
c#vb.netbadimageformatexception
Al Lelopath
Al Lelopath

Reputation: 6778

BadImageFormatException when running application

I get a BadImageFormatException when running a C#/VB SmartClient application with the Any CPU configuration. If I use x86 configuration then it runs fine. This is an old, legacy project which I occasionally have to modify and I don't know the history, so I can only guess that there are dlls that contain 32-bit native code causing this error. This all makes sense, except that when the configuration is Debug & AnyCPU it runs, only when the configuration is Release & AnyCPU does it fail. I see no significant differences in the Debug.cfg.xml and Release.cfg.xml files.

Can anyone say why it would run in the Debug configuration? Since this works I wonder if it is somehow possible to get it running in x64 (ie AnyCPU)

From the app.config:

  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>
  <startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0"/>
  </startup>

Upvotes: 0

Views: 599

Answers (2)

Mohamed Salemyan
Mohamed Salemyan

Reputation: 691

Try changing window or form icon image format from .jpg to .png. sometimes on windows server this error occurred because of icon image format.

Upvotes: 0

David Heffernan
David Heffernan

Reputation: 613461

Your application almost certainly depends on a 32 bit component. When you run your application as a 64 bit process, it fails to load that 32 bit component into your process.

Possible solutions include:

  1. Revert to running as 32 bit.
  2. Find a 64 bit version of the dependent component.

Upvotes: 1

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