diff --git a/lib/atc/ATC_Error.h b/lib/atc/ATC_Error.h
index fc356dbec..91d3b4dcf 100644
--- a/lib/atc/ATC_Error.h
+++ b/lib/atc/ATC_Error.h
@@ -1,52 +1,53 @@
 // ATC_Error : a base class for atom-continuum errors
 
 #ifndef ATC_ERROR
 #define ATC_ERROR
 
 #include <string>
 
 // the following two convert __LINE__ to a string
 #define STRING2(x) #x
 #define STRING(x) STRING2(x)
 // prints file and line number for error messages
 #define ERROR(x) __FILE__":"STRING(__LINE__)" "x
 //#define FILELINE __FILE__+to_string(__LINE__)
 #define FILELINE __FILE__
 
 #define ERROR_FOR_BACKTRACE
 #define HACK(l,m)
 
 
+
 namespace ATC {
   /**
    *  @class  ATC_Error
    *  @brief  Base class for throwing run-time errors with descriptions
    */
 
 class ATC_Error {
 
  public:
   // constructor
   ATC_Error(std::string errorDescription)
   {
     errorDescription_ = "ERROR: " + errorDescription;
     ERROR_FOR_BACKTRACE
   };
 
   ATC_Error(std::string location, std::string errorDescription)
   {
     errorDescription_ = "ERROR: " + location + ": "+ errorDescription;
     ERROR_FOR_BACKTRACE
   };
 
   std::string error_description() {
     return errorDescription_;
   };
 
  private:
   // string describing the type of error
   std::string errorDescription_;
 };
 
 }
 #endif