MichelJuillard
--- a/src/SubModel.cc
+++ b/src/SubModel.cc
-              {
-                cerr << "ERROR: the model equation defining the 'target' of 'pac_target_info(" << name << ")' contains a variable (" << symbol_table.getName(var) << ") that is not declared as a 'component'" << endl;
-                exit(EXIT_FAILURE);
-              }
+	    {
+	      auto tmp = dynamic_model.AddVariable(var);
+	      if (auto it = find_if(components.begin(), components.end(),
+				    [& tmp = tmp](const auto &v) { return get<0>(v) == tmp; });
+		  it != components.end())
+		get<4>(*it) = coeff;
+	      else
+		{
+		  cerr << "ERROR: the model equation defining the 'target' of 'pac_target_info(" << name << ")' contains a variable (" << symbol_table.getName(var) << ") that is not declared as a 'component'" << endl;
+		  exit(EXIT_FAILURE);
+		}
+	    }
--- a/src/EquationTags.hh
+++ b/src/EquationTags.hh
 #ifndef _EQUATION_TAGS_HH
 #define _EQUATION_TAGS_HH

-using namespace std;
-
+#include <iostream>