Index: /trunk/Mars/hawc/extract_singles.C
===================================================================
--- /trunk/Mars/hawc/extract_singles.C	(revision 19843)
+++ /trunk/Mars/hawc/extract_singles.C	(revision 19844)
@@ -702,9 +702,10 @@
         return 1;
     }
-    if (gSystem->AccessPathName(drsfile, kFileExists))
-    {
-        gLog << "ERROR - Cannot access drsfile file '" << drsfile << "'" << endl;
-        return 2;
-    }
+
+    // ------------------------------------------------------
+
+    MDrsCalibration drscalib300;
+    if (!drscalib300.ReadFits(drsfile))
+        return 3;
 
     // --------------------------------------------------------------------------------
@@ -713,10 +714,4 @@
     gLog << "Extract singles with '" << drsfile << "'" << endl;
     gLog << endl;
-
-    // ------------------------------------------------------
-
-    MDrsCalibration drscalib300;
-    if (!drscalib300.ReadFits(drsfile))
-        return 3;
 
     // ------------------------------------------------------