diff --git a/product/ERP5/Document/SolverProcess.py b/product/ERP5/Document/SolverProcess.py
index 3d6a9061ec764316061aea5ffaf3924279992526..ec17d68e428dce28575345bb5e71e27e2a104439 100644
--- a/product/ERP5/Document/SolverProcess.py
+++ b/product/ERP5/Document/SolverProcess.py
@@ -138,15 +138,16 @@ class SolverProcess(XMLObject, ActiveProcess):
     for movement, movement_solver_dict in movement_dict.items():
       for solver, movement_solver_configuration_list in movement_solver_dict.items():
         for configuration_mapping in movement_solver_configuration_list:
+          # Detect conflicts. This includes finding out that a solver which
+          # is exclusive per movement, conflicts with another solver on the same 
+          # movement
           solver_message_list = solver.getSolverConflictMessageList(movement, configuration_mapping, solver_dict)
           if solver_message_list:
             message_list.extend(solver_message_list)
             continue # No need to keep on
-          # Make sure multiple configuration are possible
-          try:
-            # Solver key contains only those properties which differentiate
-            # solvers (ex. there should be only Production Reduction Solver)
-            solver_key = solver.getSolverProcessGroupingKey(movement, configuration_mapping, solver_dict)
+          # Solver key contains only those properties which differentiate
+          # solvers (ex. there should be only Production Reduction Solver)
+          solver_key = solver.getSolverProcessGroupingKey(movement, configuration_mapping, solver_dict)
           except: # Raise the exception generated by the solver in case of failure of grouping
             raise
           solver_key_dict = grouped_solver_dict.setdefault(solver, {})