title: error MSB4018: The "<exec>" task failed unexpectedly
body: <p>i am getting this error with visual studio 2010 and .net framework 4.0.
  Not able to see any relevant solution for this especially with VS2010.
  any comments/suggestions pls.</p>
  
  <p>error MSB4018: The "" task failed unexpectedly
  error MSB4018: System.FormatException: Input string was not in a correct format. 
  error MSB4018:    at System.Text.StringBuilder.AppendFormat(IFormatProvider provider, String format, Object[] args) 
   error MSB4018:    at System.String.Format(IFormatProvider provider, String format, Object[] args) 
  ...
  ...
  ...</p>