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.NET Forum / .NET Framework / CLR / February 2004SecurityException & Request failed: How to know more ??
Maybe someone knows how to solve this one. My context is the following: a VB.NET WinForms app gives the following error message when launched in the Internet Zone. [...other dependent libraries loading...] Loaded 'C:\WINDOWS\assembly\GAC_Neutral\System.Xml\1.2.3400.0__b77a5c561934e089\System.Xml.dll', No symbols loaded: 'Cannot find or open the PDB file.' An unhandled exception of type 'System.Security.SecurityException' occurred in TestApplication.exe Additional information: Request failed. How can I determine where the problem comes from ? (Btw, that's a bit weak to be called "Additional information", don't you think ? ;-)) The app depends on a library which has a strong name, allows partially trusted callers, and itself depends on the following base libraries: assembly extern legacy library mscorlib assembly extern legacy library System.Windows.Forms assembly extern legacy library System.Drawing assembly extern legacy library System assembly extern legacy library System.Xml Neither the app nor the library do anything special with security explicitely (demand, assert etc.). I have traced the exact location of where the problem occurs to be the call to InitializeComponent, in the main form's constructor (where objects from the library are instantiated). The debugger won't enter the method, and even tracing the IL/assembler in DbgCLR will not show why that call cannot be made. So basically if anyone has any idea as to how to know what causes the error it would be great ! Thanks FC > Maybe someone knows how to solve this one. > > My context is the following: a VB.NET WinForms app > gives the following error message when launched in > the Internet Zone. Not all assemblies are allowed to be excuted from the Internet Zone. You can use caspol.exe to configure the security for the different zones. Greets Peter  Signature------ooo---OOO---ooo------ Peter Koen - www.kema.at MCAD MCDBA CAI/RS CASE/RS IAT ------ooo---OOO---ooo------ > Not all assemblies are allowed to be excuted from the Internet Zone. You > can use caspol.exe to configure the security for the different zones. Peter, thanks for this. My point is that there are things I could do to make this application work in the Internet Zone (modify the code, remove some dependencies), if I knew why it is not allowed to be executed from that zone. And the problem is that the error message does not give me a hint as to what causes the problem. Isn't there a way to get a more explicit error message or tool that would tell you "here is why you are not allowed to run in the Internet Zone" ? Cheers Unfortunately it is difficult to debug security exceptions in v1.0 and v1.1 of the framework, however this is one of the areas that the Visual Studio team worked on for the upcoming Whidbey release, and you'll see a lot of improvement in their new features. From Whidbey Visual Studio you'll be able to sandbox your app on the local machine, pretending that it is running with lesser permissions. Then when a security exception is thrown, you'll be notified of the exact location that caused the exception, and some suggestions you can use to remove the security problem. For more information, you can check out Ivan and Sebastian's PDC talk: http://microsoft.sitestream.com/PDC2003/ARC/ARC340_files/Default.htm -Shawn http://blogs.msdn.com/shawnfa SignatureThis posting is provided "AS IS" with no warranties, and confers no rights. Note: For the benefit of the community-at-large, all responses to this message are best directed to the newsgroup/thread from which they originated. -------------------- >From: fc308@hotmail.com >Newsgroups: microsoft.public.dotnet.framework.clr [quoted text clipped - 11 lines] >NNTP-Posting-Date: Fri, 12 Dec 2003 10:28:34 +0000 (UTC) >Path: cpmsftngxa07.phx.gbl!cpmsftngxa10.phx.gbl!TK2MSFTNGXA06.phx.gbl!TK2MSFTNGXA05.phx.gbl!TK2MSFTNGP08.phx.gbl! newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!fu-berlin.de!postnews1.google.com!not-for-mail >Xref: cpmsftngxa07.phx.gbl microsoft.public.dotnet.framework.clr:8975 >X-Tomcat-NG: microsoft.public.dotnet.framework.clr [quoted text clipped - 13 lines] > >Cheers
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