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Could not load file or assembly 'PDFNet' or one of its dependencies. An attempt was made to load a program with an incorrect format

I'm trying to build a sample web application from a blank web form template in VS2012, and add the PDFNet dll to it. If I run the project in .NET 3.5 no problem. If I run it in .NET >= 4 I get this error:

Could not load file or assembly 'PDFNet64' or one of its dependencies. An attempt was made to load a program with an incorrect format.

this is the stack trace:

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  C:\Program Files (x86)\IIS Express\iisexpress.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = COLLAB\mirko.lugano
LOG: DisplayName = PDFNet64
 (Partial)
WRN: Partial binding information was supplied for an assembly:
WRN: Assembly Name: PDFNet64 | Domain ID: 2
WRN: A partial bind occurs when only part of the assembly display name is provided.
WRN: This might result in the binder loading an incorrect assembly.
WRN: It is recommended to provide a fully specified textual identity for the assembly,
WRN: that consists of the simple name, version, culture, and public key token.
WRN: See whitepaper http://go.microsoft.com/fwlink/?LinkId=109270 for more information and common solutions to this issue.
LOG: Appbase = file:///c:/users/mirko.lugano/documents/visual studio 2012/Projects/WebApplication3/WebApplication3/
LOG: Initial PrivatePath = c:\users\mirko.lugano\documents\visual studio 2012\Projects\WebApplication3\WebApplication3\bin
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: c:\users\mirko.lugano\documents\visual studio 2012\Projects\WebApplication3\WebApplication3\web.config
LOG: Using host configuration file: C:\Users\mirko.lugano\Documents\IISExpress\config\aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/ccfa215a/dc93c54d/PDFNet64.DLL.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/ccfa215a/dc93c54d/PDFNet64/PDFNet64.DLL.
LOG: Attempting download of new URL file:///c:/users/mirko.lugano/documents/visual studio 2012/Projects/WebApplication3/WebApplication3/bin/PDFNet64.DLL.
ERR: Failed to complete setup of assembly (hr = 0x8007000b). Probing terminated.


Stack Trace:


[BadImageFormatException: Could not load file or assembly 'PDFNet64' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
   System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
   System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +34
   System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +152
   System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) +77
   System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +16
   System.Reflection.Assembly.Load(String assemblyString) +28
   System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +38

[ConfigurationErrorsException: Could not load file or assembly 'PDFNet64' or one of its dependencies. An attempt was made to load a program with an incorrect format.]
   System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +752
   System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +218
   System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +130
   System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +170
   System.Web.Compilation.WebDirectoryBatchCompiler..ctor(VirtualDirectory vdir) +124
   System.Web.Compilation.BuildManager.BatchCompileWebDirectoryInternal(VirtualDirectory vdir, Boolean ignoreErrors) +44
   System.Web.Compilation.BuildManager.BatchCompileWebDirectory(VirtualDirectory vdir, VirtualPath virtualDir, Boolean ignoreErrors) +187
   System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) +74
   System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +299
   System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +103
   System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound) +165
   System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp) +43
   System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +31
   System.Web.UI.PageHandlerFactory.GetHandler(HttpContext context, String requestType, String virtualPath, String path) +37
   System.Web.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +346
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.18033 

I have already searched a lot in the web and in google groups, and I have already tried these solutions (among the others), THIS and for instance THIS

I'm running a Windows 8 x64 PC, and I DO have the Visual c++ 2010 x64 redistributable installed on my machine. I have also tried the console applications provided by the samples downloaded from pdftron.com, and those work ok in all versions of .NET. I have tried creating a console app of my own and that too works on all versions of .NET. I had then thought it was maybe the fault of VS2012 development server which runs in x86 mode, so I set up a IIS website and run it from there, but still the same problem. I am a bit bereft, does anybody have any ideas? Thanx.

like image 872
Mirko Lugano Avatar asked Mar 19 '13 11:03

Mirko Lugano


2 Answers

Issue was solved thanks to the support of the guys @ pdftron.com. Here is the solution. In my particular case, I had the 'Enable 32-bit applications' Application Pool setting inside IIS settings set to True, which somehow conflicted with the x64 version of PDFNet.dll. Resetting it to false solved the issue.

like image 141
Mirko Lugano Avatar answered Nov 07 '22 06:11

Mirko Lugano


enter image description here

By making the DLL's "Copy Local" set to True solved my case. IIS Application pool also needs 32bit support Off.

like image 25
SurenSaluka Avatar answered Nov 07 '22 06:11

SurenSaluka