diff --git a/sim/transport/gconfig/g4Config.C b/sim/transport/gconfig/g4Config.C
index aad1a727f00ff0b26656f26e871b321174ff88f5..0ba3c7eb3cad9600a7b27da08e73270fa6a9d5a7 100644
--- a/sim/transport/gconfig/g4Config.C
+++ b/sim/transport/gconfig/g4Config.C
@@ -52,10 +52,12 @@ void Config()
 
   TString configm(gSystem->Getenv("CONFIG_DIR"));
   TString configm1 = configm + "/g4config.in";
+  configm1.ReplaceAll("//", "/");
   cout << " -I g4Config() using g4conf  macro: " << configm1 << endl;
 
   // set the common cuts
   TString cuts = configm + "/SetCuts.C";
+  cuts.ReplaceAll("//", "/");
   cout << "Physics cuts with script \n " << cuts.Data() << endl;
   Int_t cut = gROOT->LoadMacro(cuts.Data());
   if (cut == 0) gInterpreter->ProcessLine("SetCuts()");