diff -r baf0b6e40211 -r 8c44b64dd436 src/test/preflow_test.cc
--- a/src/test/preflow_test.cc	Wed Sep 15 10:34:12 2004 +0000
+++ b/src/test/preflow_test.cc	Wed Sep 15 11:50:50 2004 +0000
@@ -5,6 +5,9 @@
 #include <hugo/preflow.h>
 #include <hugo/skeletons/graph.h>
 #include <hugo/skeletons/maps.h>
+
+#include <string.h>
+
 using namespace hugo;
 
 void check_Preflow() 
@@ -66,7 +69,17 @@
 
   typedef Preflow<Graph, int> PType;
 
-  std::ifstream file("preflow_graph.out");
+  char *f_name;
+  
+  f_name=new char[strlen(getenv("srcdir"))+50];
+  strcpy(f_name,getenv("srcdir"));
+  strcat(f_name,"/preflow_graph.inp");
+  
+  std::ifstream file(f_name);
+  
+  check(file,"Input file '" << f_name << "' not found.");
+  
+  delete [] f_name;
   
   Graph G;
   Node s, t;