Hi all

My hosting company have migrated to new servers and now DNN is throwing FileIOPermission exceptions. I'll paste the error below. That's what happens if I login as host and click on "Host Settings".  More importantly, we can't add new pages. I think it's the same error but we just get the abbreviated "A critical error has occurred. Exception has been thrown by the target of an invocation." as soon as we hit the Add button.

I'm sure this is a simple permissions problem but the host support people tell me they have "reset the DNN permissions" twice. Could this be anything else? What could I tell them that would be helpful?

This is happening on two different sites. One is a test copy of the other and neither have had anything changed for months. It only happened after the server migration.

Unfortunately this has happened at the worst possible time. It's a school which is about to open for the new year and needs to post new info for parents.

Thanks

DotNetNuke.Services.Exceptions.PageLoadException: Exception has been thrown by the target of an invocation. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) at System.Security.CodeAccessPermission.Demand() at System.Reflection.Assembly.VerifyCodeBaseDiscovery(String codeBase) at System.Reflection.Assembly.get_CodeBase() at System.Web.Handlers.ScriptResourceHandler.GetCodeBaseWithAssert(Assembly assembly) at System.Web.Handlers.ScriptResourceHandler.GetLastWriteTime(Assembly assembly) at System.Web.Handlers.ScriptResourceHandler.GetAssemblyInfoInternal(Assembly assembly) at System.Web.Handlers.ScriptResourceHandler.GetAssemblyInfo(Assembly assembly) at

Thanks Cathal

I think you might be right about the zones. I can see that unblock button on some files with my Windows 7 desktop.

Unfortunately, Windows Explorer doesn't seem to provide a way of unblocking multiple files in one operation. If you select multiple files and hit properties then you get a different popup.

Which files would they need to unblock? Is it just the dll files in bin ?

Cheers
Ross

Well ... good and bad news.

I finally discovered that it was related to Ajax. If I disable Ajax using SQL (because I can't get to the host settings page) then the FileIOPermission problem goes away so the immediate crisis is solved.

Unfortunately the host has given up on this problem so we may need to live without Ajax. They've told me to "consult the DNN experts". It appears that Ajax is attempting to access something outside of the web root but I have no real way of knowing what it's trying to access or why. The thing is that this worked fine on their old server but as far as they're concerned, all the settings are the same. We do indeed seem to have the usual full read/write permission on the web root and sub folders. I temporarily put some testing / debugging code in Default.aspx.vb to confirm that. They assure me that we have .NET 3.5sp1.

Does anyone have any suggestions of what the problem could be?

I'm embarrassed to say it but this is DNN 04.08.02. I know we should upgrade but some of the modules are not upgradable and it's been generally working fine. I patched the file upload venerability that we got hit with a few times. We may be building a new site in the next few months.

I might install a clean copy of the latest version of DNN and see if it happens with that. If it does then I can say to the host that you effectively no longer support DNN.

Thanks