diff --git a/compiler/global/global_mapfold.ml b/compiler/global/global_mapfold.ml
index 2052398..6e4c5eb 100644
--- a/compiler/global/global_mapfold.ml
+++ b/compiler/global/global_mapfold.ml
@@ -1,5 +1,6 @@
 open Misc
 open Types
+(*open Clocks*)
 open Signature
 
 type 'a global_it_funs = {
@@ -7,21 +8,20 @@ type 'a global_it_funs = {
     'a global_it_funs -> 'a -> static_exp -> static_exp * 'a;
   static_exp_desc :
     'a global_it_funs -> 'a -> static_exp_desc -> static_exp_desc * 'a;
-  ty :
-    'a global_it_funs -> 'a -> ty -> ty * 'a;
-  param:
-    'a global_it_funs -> 'a -> param -> param * 'a;
+  ty : 'a global_it_funs -> 'a -> ty -> ty * 'a;
+(*  ct : 'a global_it_funs -> 'a -> ct -> ct * 'a;
+  ck : 'a global_it_funs -> 'a -> ck -> ck * 'a;
+  link : 'a global_it_funs -> 'a -> link -> link * 'a; *)
+  param: 'a global_it_funs -> 'a -> param -> param * 'a;
   arg: 'a global_it_funs -> 'a -> arg -> arg * 'a;
   node : 'a global_it_funs -> 'a -> node -> node * 'a;
-  structure:
-    'a global_it_funs -> 'a -> structure -> structure * 'a;
-  field:
-    'a global_it_funs -> 'a -> field -> field * 'a; }
+  structure: 'a global_it_funs -> 'a -> structure -> structure * 'a;
+  field: 'a global_it_funs -> 'a -> field -> field * 'a; }
 
 let rec static_exp_it funs acc se = funs.static_exp funs acc se
 and static_exp funs acc se =
-  let se_desc, acc = static_exp_desc_it funs acc se.se_desc in
   let se_ty, acc = ty_it funs acc se.se_ty in
+  let se_desc, acc = static_exp_desc_it funs acc se.se_desc in
   { se with se_desc = se_desc; se_ty = se_ty }, acc
 
 and static_exp_desc_it funs acc sd =
@@ -58,6 +58,30 @@ and ty funs acc t = match t with
       let se, acc = static_exp_it funs acc se in
       Tarray (t, se), acc
 
+(*
+and ct_it funs acc c = try funs.ct funs acc c with Fallback -> ct funs acc t
+and ct funs acc c = match c with
+  | Ck(ck) -> let ck, acc = ck_it funs acc ck in Ck ck, acc
+  | Cprod(ct_l) ->
+      let ct_l, acc = mapfold (ct_it funs) acc ct_l in Cprod ct_l, acc
+
+and ck_it funs acc c = try funs.ck funs acc c with Fallback -> ck funs acc c
+and ck funs acc c = match c with
+  | Cbase -> c, acc
+  | Cvar(link_ref) ->
+      let l, acc = link_it funs acc link_ref.contents in
+      Cvar {link_ref with contents = l}, acc
+  | Con(ck, constructor_name, var_ident) ->
+      let ck, acc = ck_it funs acc ck in
+      Con (ck, constructor_name, var_ident), acc
+
+and link_it funs acc c =
+  try funs.link funs acc c with Fallback -> link funs acc c
+and link funs acc l = match l with
+  | Cindex _ -> l, acc
+  | Clink(ck) -> let ck, acc = ck_it funs acc ck in Clink ck, acc
+*)
+
 and structure_it funs acc s = funs.structure funs acc s
 and structure funs acc s =
   mapfold (field_it funs) acc s
@@ -102,7 +126,7 @@ let defaults = {
 }
 
 
-(* Used to stop the pass at this level *)
+(** Is used to stop the pass at this level *)
 let stop funs acc x = x, acc
 
 let defaults_stop = {
diff --git a/compiler/minils/mls_mapfold.ml b/compiler/minils/mls_mapfold.ml
index 66cafaa..e3a98d2 100644
--- a/compiler/minils/mls_mapfold.ml
+++ b/compiler/minils/mls_mapfold.ml
@@ -12,8 +12,8 @@ open Global_mapfold
 open Minils
 
 (* /!\ do never, never put in your funs record one
-  of the generic iterator function (_omega),
-  either yours either the _default version *)
+  of the generic iterator function (_it),
+  either yours either the default version named according to the type. *)
 
 type 'a mls_it_funs = {
   app:        'a mls_it_funs -> 'a -> Minils.app -> Minils.app * 'a;
diff --git a/compiler/minils/transformations/callgraph_mapfold.ml b/compiler/minils/transformations/callgraph_mapfold.ml
index b9b82a6..a28d789 100644
--- a/compiler/minils/transformations/callgraph_mapfold.ml
+++ b/compiler/minils/transformations/callgraph_mapfold.ml
@@ -170,16 +170,18 @@ let generate_new_name ln params =
 module Instantiate =
 struct
   (** Replaces static parameters with their value in the instance. *)
-  let static_exp funs m se = match se.se_desc with
-    | Svar ln ->
-        let se = (match ln with
-           | Name n ->
-               (try NamesEnv.find n m
-                with Not_found ->
-                      Error.message se.se_loc (Error.Evar_unbound n))
-           | Modname _ -> se) in
+  let static_exp funs m se =
+    let se, m = Global_mapfold.static_exp funs m se in
+    match se.se_desc with
+      | Svar ln ->
+          let se = (match ln with
+             | Name n ->
+                 (try NamesEnv.find n m
+                  with Not_found ->
+                    Error.message se.se_loc (Error.Evar_unbound n))
+             | Modname _ -> se) in
           se, m
-    | _ -> Global_mapfold.static_exp funs m se
+      | _ -> se, m
 
   (** Replaces nodes call with the call to the correct instance. *)
   let edesc funs m ed =