Just update to 13.1 and ran the conversion on my project.
Had to update project to .net 4.0
Had to update IIS to .net 4.0
Now I get this:
Exception of type 'System.OutOfMemoryException' was thrown. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.]
System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type) +0
System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase) +67
System.Web.UI.Util.GetTypeFromAssemblies(IEnumerable assemblies, String typeName, Boolean ignoreCase) +146
System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +8941028
DevExpress.Web.ASPxClasses.Internal.HttpUtils.get_DXValidatorType() +66
DevExpress.Web.ASPxClasses.Internal.HttpUtils.GetValueFromRequest(HttpRequest request, String key, Boolean skipValidation) +59
DevExpress.Web.ASPxClasses.Internal.HttpUtils.GetValueFromRequest(String key, Boolean skipValidation) +63
DevExpress.Web.ASPxClasses.Internal.HttpUtils.GetValueFromRequest(String key) +33
DevExpress.Web.ASPxClasses.Internal.MvcUtils.get_CallbackName() +72
DevExpress.Web.ASPxClasses.Internal.MvcUtils.IsCallback() +25
DevExpress.Web.ASPxClasses.Internal.RenderUtils.IsAnyCallback(Page page) +98
DevExpress.Web.ASPxClasses.ASPxWebControl.CanModifyHeaderControl() +118
DevExpress.Web.ASPxClasses.ASPxWebControl.CanCreateStyleSheetHeaderControl() +31
DevExpress.Web.ASPxClasses.ASPxWebControl.OnPreRender(EventArgs e) +195
DevExpress.Web.ASPxClasses.ASPxDataWebControlBase.OnPreRender(EventArgs e) +59
System.Web.UI.Control.PreRenderRecursiveInternal() +103
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2496
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272