Exit code 100. Too many semaphores

I'm writing a C# program in Visual Studio 2012 and I have a problem. Here's my code fragment: ``` Process proc = new Process(); proc.StartInfo.Verb = "runas"; proc.StartInfo.FileName = "C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\regasm.exe"; proc.StartInfo.Arguments = "Absolute\\path\\to\\File.dll /codebase /tlb"; proc.Start(); proc.WaitForExit(); MessageBox.Show("Exit code: "+proc.ExitCode); proc.Close(); ``` The problem is, when I build a Debug binary and run it, it works just great. Launches regasm.exe, registers the DLL, generates the .tlb file and it's all dandy. But when I run a Release binary, nothing works and the MessageBox shows me "Exit code: 100". I looked it up but haven't really found anything useful at all. Found my solution here: http://objectmix.com/dotnet/320921-regasm-tlb-complaints-element-not-found.html RegAsm.exe error was like this: ``` RegAsm : error RA0000 : Type library exporter encountered an error while processing 'Ruby2net.IRuby2net, Ruby2net'. Error: Element not found. ``` It looks like it was because I accidentally used the same `GUID` twice in my program. Thank you all for your time.