diff --git a/Util/ProgramOptions.h b/Util/ProgramOptions.h
index 160c47938..bdabb2ddb 100644
--- a/Util/ProgramOptions.h
+++ b/Util/ProgramOptions.h
@@ -238,6 +238,8 @@ inline bool GenerateServerProgramOptions(
             !boost::filesystem::is_regular_file(path_iterator->second)
         ) {
             path_iterator->second = base_string + ".hsgr";
+        } else {
+            throw OSRMException(base_string + ".hsgr not found");
         }
 
         path_iterator = paths.find("nodesdata");
@@ -246,38 +248,52 @@ inline bool GenerateServerProgramOptions(
             !boost::filesystem::is_regular_file(path_iterator->second)
         ) {
             path_iterator->second = base_string + ".nodes";
+        } else {
+            throw OSRMException(base_string + ".nodes not found");
         }
 
+
         path_iterator = paths.find("edgesdata");
         if(
             path_iterator != paths.end() &&
             !boost::filesystem::is_regular_file(path_iterator->second)
         ) {
             path_iterator->second = base_string + ".edges";
+        } else {
+            throw OSRMException(base_string + ".edges not found");
         }
 
+
         path_iterator = paths.find("ramindex");
         if(
             path_iterator != paths.end() &&
             !boost::filesystem::is_regular_file(path_iterator->second)
         ) {
             path_iterator->second = base_string + ".ramIndex";
+        } else {
+            throw OSRMException(base_string + ".ramIndex not found");
         }
 
+
         path_iterator = paths.find("fileindex");
         if(
             path_iterator != paths.end() &&
             !boost::filesystem::is_regular_file(path_iterator->second)
         ) {
             path_iterator->second = base_string + ".fileIndex";
+        } else {
+            throw OSRMException(base_string + ".fileIndex not found");
         }
 
+
         path_iterator = paths.find("namesdata");
         if(
             path_iterator != paths.end() &&
             !boost::filesystem::is_regular_file(path_iterator->second)
         ) {
             path_iterator->second = base_string + ".names";
+        } else {
+            throw OSRMException(base_string + ".namesIndex not found");
         }
 
         path_iterator = paths.find("timestamp");