Index: /trunk/FACT++/src/DataWriteFits.h
===================================================================
--- /trunk/FACT++/src/DataWriteFits.h	(revision 18888)
+++ /trunk/FACT++/src/DataWriteFits.h	(revision 18889)
@@ -28,5 +28,5 @@
 
 public:
-    DataWriteFits(const std::string path, uint64_t night,  uint32_t runid, MessageImp &imp) :
+    DataWriteFits(const std::string &path, uint64_t night,  uint32_t runid, MessageImp &imp) :
         DataProcessorImp(path, night, runid, imp), fConv(0), fFile(imp)
     {
Index: /trunk/FACT++/src/DataWriteFits2.cc
===================================================================
--- /trunk/FACT++/src/DataWriteFits2.cc	(revision 18888)
+++ /trunk/FACT++/src/DataWriteFits2.cc	(revision 18889)
@@ -11,5 +11,5 @@
 using namespace std;
 
-DataWriteFits2::DataWriteFits2(const std::string path, uint64_t night, uint32_t runid, MessageImp &imp)
+DataWriteFits2::DataWriteFits2(const std::string &path, uint64_t night, uint32_t runid, MessageImp &imp)
     : DataProcessorImp(path, night, runid, imp)
 {
@@ -17,5 +17,5 @@
 }
 
-DataWriteFits2::DataWriteFits2(const std::string path, uint64_t night, uint32_t runid, const DrsCalibration &cal, MessageImp &imp)
+DataWriteFits2::DataWriteFits2(const std::string &path, uint64_t night, uint32_t runid, const DrsCalibration &cal, MessageImp &imp)
     : DataProcessorImp(path, night, runid, imp)
 {
Index: /trunk/FACT++/src/DataWriteFits2.h
===================================================================
--- /trunk/FACT++/src/DataWriteFits2.h	(revision 18888)
+++ /trunk/FACT++/src/DataWriteFits2.h	(revision 18889)
@@ -25,6 +25,6 @@
 
 public:
-    DataWriteFits2(const std::string path, uint64_t night, uint32_t runid, MessageImp &imp);
-    DataWriteFits2(const std::string path, uint64_t night, uint32_t runid, const DrsCalibration &cal, MessageImp &imp);
+    DataWriteFits2(const std::string &path, uint64_t night, uint32_t runid, MessageImp &imp);
+    DataWriteFits2(const std::string &path, uint64_t night, uint32_t runid, const DrsCalibration &cal, MessageImp &imp);
 
     bool Open(const RUN_HEAD &h, const FAD::RunDescription &d);