E <pymod> error in 'mm_attach'
  File "/Users/goldeye/asss/working/bin/jpcounter.py", line 20, in mm_attach
    vl = get_interface(I_VARLVZ,a);
Exception: py->py interface varlvz-2 wasn't found

typedef struct Ivarlvz
{
   INTERFACE_HEAD_DECL
   /* pyint: use */


   void (*RefreshLVZ)(const Target *target);
   /* pyint: target -> void */

   void (*ToggleLVZVar)(const Target *target, char *name, int state);
   /* pyint: target, string, int -> void */

   void (*ToggleLVZVarByPtr)(const Target *target, lvzvar *var, int state);

     /* Toggles each lvzvar *var in list to var->next
    * A next value of VLVZ_CURRENT is ignored, and causes no change
    * next is set to VLVZ_CURRENT whenever this func changes it.
    */
  //     void (*ToggleLVZList)(Target *target, LinkedList *list);

     /* Returns a pointer to the lvzvar for arenas variable with name
    * or returns NULL if that variable was not found.
    */
   lvzvar *(*GetVar)(Arena *arena, char *name);
         
     /* Returns a pointer to the list of variables in arena
    * or NULL if that arena's variables were not initialized.
    */
   LinkedList *(*GetVarList)(Arena *arena);
} Ivarlvz;