EventLoaderTimepix3: make error message more useful

src/modules/EventLoaderTimepix3/EventLoaderTimepix3.cpp

@@ -98,7 +98,8 @@ void EventLoaderTimepix3::initialise() {
 
     // Check that we have files for this detector and sort them correctly:
     if(detector_files.empty()) {
-        LOG(ERROR) << "No data file found for detector " << m_detector->name();
+        LOG(ERROR) << "No data file found for detector " << m_detector->name() << " in input directory " << std::endl
+                   << m_inputDirectory;
         return;
     }