error CS1009: Unrecognized escape sequence on appharbor

Question

i got the following error when uploaded my files to AppHarbor

    [HttpCompileException]: d:\temp\f3fkwz4z.mbc\temp\root\0c956e8e\9304c5fb\App_Web_ixu4pbnj.0.cs(43): error CS1009: Unrecognized escape sequence
   at System.Web.Compilation.AssemblyBuilder.Compile()
   at System.Web.Compilation.WebDirectoryBatchCompiler.CompileAssemblyBuilder(AssemblyBuilder builder)
   at System.Web.Compilation.WebDirectoryBatchCompiler.<CompileNonDependentBuildProviders>b__0(AssemblyBuilder assemblyBuilder)
   at System.Web.Compilation.CompilationUtil.CompileParallel(ICollection assemblyBuilders, Action`1 action)
   at System.Web.Compilation.WebDirectoryBatchCompiler.CompileNonDependentBuildProviders(ICollection buildProviders)
   at System.Web.Compilation.WebDirectoryBatchCompiler.Process()
   at System.Web.Compilation.BuildManager.BatchCompileWebDirectoryInternal(VirtualDirectory vdir, Boolean ignoreErrors)
   at System.Web.Compilation.BuildManager.BatchCompileWebDirectory(VirtualDirectory vdir, VirtualPath virtualDir, Boolean ignoreErrors)
   at System.Web.Compilation.BuildManager.PrecompileWebDirectoriesRecursive(VirtualDirectory vdir, Boolean topLevel)
   at System.Web.Compilation.BuildManager.PrecompileWebDirectoriesRecursive(VirtualDirectory vdir, Boolean topLevel)
   at System.Web.Compilation.BuildManager.PrecompileWebDirectoriesRecursive(VirtualDirectory vdir, Boolean topLevel)
   at System.Web.Compilation.BuildManager.PrecompileAppInternal(VirtualPath startingVirtualDir, IEnumerable`1 excludedVirtualPaths)
   at System.Web.Compilation.BuildManager.PrecompileApp(VirtualPath startingVirtualDir, IEnumerable`1 excludedVirtualPaths)
   at System.Web.Compilation.BuildManager.PrecompileApp(ClientBuildManagerCallback callback, IEnumerable`1 excludedVirtualPaths)
   at System.Web.Compilation.BuildManagerHost.PrecompileApp(ClientBuildManagerCallback callback, List`1 excludedVirtualPaths)
   at System.Web.Compilation.BuildManagerHost.PrecompileApp(ClientBuildManagerCallback callback, List`1 excludedVirtualPaths)
   at System.Web.Compilation.ClientBuildManager.PrecompileApplication(ClientBuildManagerCallback callback, Boolean forceCleanBuild)
   at System.Web.Compilation.ClientBuildManager.PrecompileApplication(ClientBuildManagerCallback callback)
   at System.Web.Compilation.Precompiler.Main(String[] args)

although no such file exist in my project it is Asp.Net MVC4 project with EntityFramework i dont understand from where the error comes

Answer 1

That strange file name that you are seeing is AppHarbor compiling your cshtml/vbhtml files when you deploy. Any errors in those files (bad Model property calls, even bad HTML) can cause the build to fail on those files and provide some pretty cryptic errors.

Try setting the MvcBuildViews property to true (Here is how to do that via Phil Haack) and see if you can use Visual Studio to help localize and correct the error.