In the mpei maker, you cannot enter the current directory as a location for the resulting mpei file. When you try a filename like "filename.mpei" or ".\filenmae.mpei" you will get an exception.

h4. Additional Information
At "Generate update xml" the syntax ".\update.xml" does work though. The reason is that the following code isn't called in the first situation:

Code:

  if (!Path.IsPathRooted(fileName))
          fileName = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(Package.ProjectSettings.ProjectFilename), fileName));