GetFullPath Mac Hang when Function get called...

Hi
       Using UNavServicesDialogs::AskSaveFile Function, I am trying to
save file.
After calling this function i get FSSpec , then using following method
i m trying
to get fullpath of the selected file. But  sometimes the Mac ( OS X
10.3.2) gets
hang, application not responding.
       Please suggest whats wrong with the following method...

Thanks in advance.


static bool GetFullPathWithString( const FSSpec& theSpec, std::string&
outPath )
		{
			 OSStatus error = noErr;
			 Handle fullPath = NULL;
			 short fullPathLength;
			 outPath.clear();
			error = ::FSpGetFullPath( &theSpec, &fullPathLength, &fullPath
);		// Get full path to file
			//error = ::GetFullPath(theSpec.vRefNum, theSpec.parID,
theSpec.name, &fullPathLength, &fullPath);
			if(( error != noErr ) && ( fullPath == NULL ))
			{
				       outPath = "";
				      return false;
			}
			outPath.append( *fullPath, fullPathLength );
			::DisposeHandle( fullPath );
			fullPath = NULL;
			return  true ; 
		}