It is "parsing assemblies" on an obfuscated dll. "DozingDogs_Licensing" is that helps. Build266, VS2005 JetBrains.ReSharper.Util.InternalErrorException: Value cannot be null. Parameter name: ptr An exception has occurred ---> System.ArgumentNullException: Value cannot be null. Parameter name: ptr at System.Runtime.InteropServices.Marshal.PtrToStringUni(IntPtr ptr, Int32 len) at JetBrains.ReSharper.Metadata.Reader.Impl.LiteralValueDecoder.GetLiteralValue(ElementType elementType, IntPtr valuePointer, Int32 length) in c:\Agent\work\ReSharper2.0\src\Metadata\src\Reader\Impl\LiteralValueDecoder.cs:line 139 at JetBrains.ReSharper.Metadata.Reader.Impl.MetadataField.ImportLiteralValue() in c:\Agent\work\ReSharper2.0\src\Metadata\src\Reader\Impl\MetadataField.cs:line 168 at JetBrains.ReSharper.Metadata.Reader.Impl.MetadataField..ctor(MetadataToken token, MetadataAssembly assembly) in c:\Agent\work\ReSharper2.0\src\Metadata\src\Reader\Impl\MetadataField.cs:line 35 at JetBrains.ReSharper.Metadata.Reader.Impl.MetadataType.GetFields() in c:\Agent\work\ReSharper2.0\src\Metadata\src\Reader\Impl\MetadataType.cs:line 213 at JetBrains.ReSharper.Psi.Impl.Reflection2.MemberOwner..ctor(Element element, IMetadataTypeInfo info) in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\reflection2\MemberOwner.cs:line 63 at JetBrains.ReSharper.Psi.Impl.Reflection2.ElementBuilderUtil.CreateType(Element parent, IMetadataTypeInfo typeInfo) in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\reflection2\util\ElementBuilderUtil.cs:line 76 at JetBrains.ReSharper.Psi.Impl.Reflection2.AssemblyPsiFile..ctor(IMetadataAssembly assembly, IModule containingModule, DateTime assemblyTimestamp) in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\reflection2\AssemblyPsiFile.cs:line 74 at JetBrains.ReSharper.Psi.Impl.Caches2.SymbolCache.SymbolCache.BuildPsi(AssemblyLoader2 loader, IAssembly assembly, DateTime assemblyTimestamp) in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\caches2\symbolCache\SymbolCache.cs:line 909 at JetBrains.ReSharper.Psi.Impl.Caches2.SymbolCache.SymbolCache.OnAssemblyAdded(IAssembly assembly) in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\caches2\symbolCache\SymbolCache.cs:line 597 at JetBrains.ReSharper.Psi.Impl.Caches2.CompositeCache.OnAssemblyAdded(IAssembly assembly) in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\caches2\CompositeCache.cs:line 148 at JetBrains.ReSharper.Psi.Impl.Caches2.CacheUpdater.AddAssemblyJob.Do() in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\caches2\symbolCache\CacheUpdater.cs:line 284 at JetBrains.ReSharper.Psi.Impl.Caches2.CacheUpdateThread.Run() in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\caches2\CacheUpdateThread.cs:line 98 — End of inner exception stack trace — at JetBrains.ReSharper.Util.Logger.LogExceptionEx(Exception, String, Boolean) in c:\Agent\work\ReSharper2.0\src\Util\src\Logger.cs:line 331 column 9 at JetBrains.ReSharper.Util.Logger.LogException(Exception) in c:\Agent\work\ReSharper2.0\src\Util\src\Logger.cs:line 343 column 5 at JetBrains.ReSharper.Psi.Impl.Caches2.CacheUpdateThread.Run() in c:\Agent\work\ReSharper2.0\src\Psi\src\impl\caches2\CacheUpdateThread.cs:line 107 column 11 at System.Threading.ThreadHelper.ThreadStart_Context(Object) at System.Threading.ExecutionContext.Run(ExecutionContext, ContextCallback, Object) at System.Threading.ThreadHelper.ThreadStart()