update acquisition

common/configuration.cpp

@@ -53,7 +53,7 @@ bool ConfigurationInterface::pntIsValid(unsigned int e_r) const
 {
   if( !(e_r<_np) )
   {
-    throw Exception("Emitter-receiver "+std::to_string(e_r)+" is out of scope.");
+    throw Exception("Emitter-receiver "+std::to_string(e_r)+" is out of scope. There are only "+std::to_string(_np)+" points.");
   }
   return true;
 }

specific/configuration/flexible_acquisition.cpp

@@ -70,6 +70,9 @@ namespace flexible_acquisition
           _er_positions.push_back(coords);
         }
 
+        _np = _er_positions.size();
+
+
         mesh();
 
         
@@ -86,6 +89,7 @@ namespace flexible_acquisition
         }
 
 
+
         /*
         * DOMAIN
         */