ASP.NET strange compilation error

Question

I don\'t know what\'s wrong with my machine, but it\'s a while that I\'m getting the following strange error from ASP.NET (for all my applications).

Compilat         


        

Answer 1

This kind of errors appears "strange" because they are related to the .NET Framework dynamic source code generation and compilation feature, and, in my opinion, the various errors generated are not reported with all the information needed to understand the real root cause. IIS will report only a generic failure like "Configuration Error" or "Compilation Error", the command line of the dynamic compilation (with reference to temporary files created on-the-fly), and an error code.

Since the error is generic, by searching it on Internet (and in answers to this question), you'll find several different solutions that solved the issue for other people, but will not necessarily solve the issue for your specific case.

For the specific error reported in this question "-1073741502", the root cause appears to be a "DLL Initialization Failed" error during the compilation and from the following article it is likely to happen when the system is low on what is called Desktop Heap memory: https://blogs.msdn.microsoft.com/friis/2012/09/19/c-compiler-or-visual-basic-net-compilers-fail-with-error-code-1073741502-when-generating-assemblies-for-your-asp-net-site/ .

The same blog post suggests to change the app pool account to give more "Desktop Heap memory" or to increase it by changing Windows registry. And the solution to change the app pool account is the one accepted for this answer: https://stackoverflow.com/a/6929129/1996150

Since the "dynamic compilation" of ASP.NET pages appears to be not mandatory if all the code is already compiled within Visual Studio, in many cases similar errors can be solved by manually removing the element "<system.codedom>" from web.config file or removing the Microsoft.CodeDom.Providers.DotNetCompilerPlatform NuGet package (see https://stackoverflow.com/a/49903967/1996150).

Answer 2

I just ran into this on .NET 4.6.1 and it ultimately had a simple solution - I removed (actually commented out) the section in the web.config and the web forms application came back to life. See what-exactly-does-system-codedom-compilers-do-in-web-config-in-mvc-5 for more info.

It worked for me.

Answer 3

I resolved this by deleting the contents of the bin and obj folders for the project, and the contents of the bin folder on the remote server, then redeploying.

Answer 4

I had this error message and for me the solution was to install Dot Net Framework 4.6 ,While my project targeted 4.5.2

Answer 5

OK, after days struggling with this issue, I finally fixed it.

• Not by clearing ASP.NET temp
• Not by reinstalling the .NET framework!

Simple!

• I changed the application pool identity from "Local system" to "ApplicationPoolIdentity"

Apparently there was a permission error with my local system that the C# compiler (csc.exe) could not access some resources and source codes.

In order to change your AppPool identity follow steps given here: http://learn.iis.net/page.aspx/624/application-pool-identities/

Answer 6

I removed Roslyn related packages by NuGet and it does work now.

Roslyn related packages:

• Microsoft.CodeDom.Providers.DotNetCompilerPlatform
• Microsoft.Net.Compilers

P.S: My local IIS doesn't have any problem with Roslyn but as I publish the project on the server (this is why I don't think the server supports Roslyn), it shows the following error message:

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: The compiler failed with error code -532462766.

Show Detailed Compiler Output:

C:\Windows\SysWOW64\inetsrv>D:\...\wwwroot\bin\roslyn\csc.exe /t:library /utf8output /nostdlib+ /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Runtime\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Runtime.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\08433893\97359c03_e1abd201\System.Web.WebPages.Deployment.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Extensions\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.Extensions.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\2574b56e\eed229e7_dfabd201\Autofac.Integration.WebApi.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Microsoft.VisualStudio.Web.PageInspector.Loader\v4.0_1.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Web.PageInspector.Loader.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\2da0bd13\b2333a9c_e0abd201\System.Net.Http.Formatting.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\99fd000f\fe3c7c0e_e1abd201\System.Web.WebPages.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\695a732a\7a32e84e_e2abd201\WebGrease.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Activities\v4.0_4.0.0.0__31bf3856ad364e35\System.Activities.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_32\System.EnterpriseServices\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\ca091706\f1f4ae28_78afd201\Core.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\ce3c4f34\2b7b911a_e0abd201\EntityFramework.SqlServer.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\c73494ac\8f453228_78afd201\CommonViewModels.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Microsoft.Web.Infrastructure\v4.0_1.0.0.0__31bf3856ad364e35\Microsoft.Web.Infrastructure.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.WorkflowServices\v4.0_4.0.0.0__31bf3856ad364e35\System.WorkflowServices.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\03d13810\0845500f_e1abd201\System.Web.Http.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\5cc83c73\51b7f8fe_e0abd201\System.Web.Http.WebHost.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\290d81d3\fb074b29_78afd201\Data.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Activation\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Activation.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\7a5d0293\283dbf3a_e0abd201\GridMvc.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\eb50e8c6\1900fa91_e0abd201\System.Web.Razor.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\a7d6ceb3\4c5f9c2c_78afd201\Web.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml.Linq\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.Linq.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages.Deployment\v4.0_2.0.0.0__31bf3856ad364e35\System.Web.WebPages.Deployment.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.DynamicData\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.DynamicData.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\3bd130ea\7b432ba6_e0abd201\System.Web.Optimization.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel\v4.0_4.0.0.0__b77a5c561934e089\System.ServiceModel.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_32\System.Web\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Web.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\8486430e\674206e7_dfabd201\Autofac.Integration.Mvc.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\c0d9cc06\83811806_e1abd201\System.Web.WebPages.Razor.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Microsoft.CSharp\v4.0_4.0.0.0__b03f5f7f11d50a3a\Microsoft.CSharp.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\8835020a\58c1c60e_e1abd201\System.Web.Helpers.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\30c33f64\00d8a820_d154d201\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.IdentityModel\v4.0_4.0.0.0__b77a5c561934e089\System.IdentityModel.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Web\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Web.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\6ea00d7f\02323228_78afd201\Extensions.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\f8f1e397\e9660a29_78afd201\Services.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\ff57243f\bb5e8b92_e0abd201\System.Web.Mvc.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Runtime.Serialization\v4.0_4.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages.Deployment\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.WebPages.Deployment.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Data.DataSetExtensions\v4.0_4.0.0.0__b77a5c561934e089\System.Data.DataSetExtensions.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Activities\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Activities.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\fd2c5d18\00ae74dd_e7acd201\Autofac.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.ComponentModel.DataAnnotations\v4.0_4.0.0.0__31bf3856ad364e35\System.ComponentModel.DataAnnotations.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.ApplicationServices\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.ApplicationServices.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\a44c79bb\74928fbb_e0abd201\EntityFramework.dll" /R:"C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Services\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Web.Services.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\227cd18a\6ab66d28_78afd201\Domain.dll" /R:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\assembly\dl3\8cbb60ec\00788858_b3abd201\Newtonsoft.Json.dll" /out:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\App_Code._bgj8eyw.dll" /debug- /optimize+ /warnaserror- /w:4 /nowarn:1659;1699;1701;612;618 /langversion:6 /nowarn:1659;1699;1701  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\App_Code._bgj8eyw.0.cs" "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\a47e39f5\cc42bc06\App_Code._bgj8eyw.1.cs"

---

How to uninstall the Roslyn packages.

In the Solution Explorer, by Right-Click on the web project, select Manage NuGet Packages....
Go to Installed tab then search the related Roslyn packages as mentioned at above.
Use Uninstall button to delete them.