diff --git a/input/Bones2021/common.txt b/input/Bones2021/common.txt
index e930ce89e567f7c305cc8af825e473b406dd6b60..9a4fc689568bf2be4fc94af593dae4f620ce75a5 100644
--- a/input/Bones2021/common.txt
+++ b/input/Bones2021/common.txt
@@ -20,9 +20,9 @@ np = 2
 # nombre de points sur le réseau circulaire
 emitter_offset = 0
 # premier émetteur en où la référence est le premier point sur la parallèle 
-emitter_skip = 1
+emitter_skip = 2
 receiver_offset = 1
-receiver_skip = 1
+receiver_skip = 2
 receiver_on_emitter=0
 # valeur de la slowness squared
 Re(mbc0) = 0.45e-6
diff --git a/specific/configuration/newConfiguration.h b/specific/configuration/newConfiguration.h
index 88143a55ecb515b7138313dd47fac6d7d10e2b38..11315c3964333614cc2a359c2eb0b5dc6b22ee34 100644
--- a/specific/configuration/newConfiguration.h
+++ b/specific/configuration/newConfiguration.h
@@ -28,8 +28,9 @@ ConfigurationInterface* newConfiguration(std::string name, const Parametrization
     else if(configuration=="circular_acquisition"){return new circular_acquisition::Configuration(name, parametrization, gmshFem);}
     else if(configuration=="line_acquisition"){return new line_acquisition::Configuration(name, parametrization, gmshFem);}
     else
-    {
-        throw gmshfem::common::Exception("Configuration " + configuration + " is not valid.");
+    {	msg::print << "Initialize line configuration" << msg::endl;
+
+        throw gmshfem::common::Exception("Config " + configuration + " is not valid.");
         return NULL;
     }
 }