Home : Exceptions/Errors : Ionic.ZlibException Encountered When Using DotImage
Q10410 - ERRMSG: Ionic.ZlibException Encountered When Using DotImage

Customers using our AnyCPU dlls have reported an Ionic.ZlibException when attempting to open Png files using our AnyCPU assemblies ***.

{Ionic.Zlib.ZlibException: Bad state (incorrect data check)
   at Ionic.Zlib.InflateManager.Inflate(FlushType flush)
   at Ionic.Zlib.ZlibCodec.Inflate(FlushType flush)
   at Ionic.Zlib.ZlibBaseStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at Ionic.Zlib.ZlibStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at Atalasoft.Imaging.Codec.Png.PngReader.g()
   at Atalasoft.Imaging.Codec.Png.PngReader.DecodeImage()
...

The issue is caused because the AnyCPU dlls shipped with DotImage are only meant for a very limited subset of use cases, involving ShrePoint web parts.

With those exceptions, you must either target "x86" or "x64" as Atalasoft components rely upon "unmanaged code" which can not be run in an "AnyCPU" context.

The fix is to target either x86 (most common as x86 apps run on both x86 and x64 systems) or x64 and use the correct Atalasoft DLLs for your "bitness" and framework (use our 2.0 dlls for .NET framework 2.0, 3.0, and 3.5, and use our 4.0 DLLs for framework 4.0, and 4.5)

 

*** NOTE:
Atalasoft stopped shipping the AnyCPU libraries in 10.7 due to these assemblies only being usable in a tiny fraction of use cases and having caused a great deal of confusion for customers.  If you'd like an option for AnyCPU support, please see our GitHub article on the subject.

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