Index: trunk/src/libcschem/concrete.h
===================================================================
--- trunk/src/libcschem/concrete.h	(revision 11144)
+++ trunk/src/libcschem/concrete.h	(revision 11145)
@@ -194,6 +194,7 @@
 	char *file_name;   /* hint: trace file name from which the group was loaded, if available */
 	csch_rtree_box_t bbox_flt; /* bounding box with floaters included (e.g. for sheet size) */
 	const csch_extobj_impl_t *extobj; /* handler; not NULL if extobj attrib is set, but if implementation no found, all fields are NULL */
+	long extobj_inhibit;        /* if >0 do not call extobj hooks */
 };
 
 typedef enum csch_sheet_type_e {
Index: trunk/src/libcschem/extobj.h
===================================================================
--- trunk/src/libcschem/extobj.h	(revision 11144)
+++ trunk/src/libcschem/extobj.h	(revision 11145)
@@ -56,19 +56,19 @@
 /*** implementation ***/
 RND_INLINE void csch_extobj_update(csch_cgrp_t *grp)
 {
-	if ((grp->extobj != NULL) && (grp->extobj->update != NULL))
+	if ((grp->extobj_inhibit == 0) && (grp->extobj != NULL) && (grp->extobj->update != NULL))
 		grp->extobj->update(grp);
 }
 
 RND_INLINE void csch_extrobj_attr_edit_pre(csch_cgrp_t *grp, const char *key)
 {
-	if ((grp->extobj != NULL) && (grp->extobj->attr_edit_pre != NULL))
+	if ((grp->extobj_inhibit == 0) && (grp->extobj != NULL) && (grp->extobj->attr_edit_pre != NULL))
 		grp->extobj->attr_edit_pre(grp, key);
 }
 
 RND_INLINE void csch_extrobj_attr_edit_post(csch_cgrp_t *grp, const char *key)
 {
-	if ((grp->extobj != NULL) && (grp->extobj->attr_edit_post != NULL))
+	if ((grp->extobj_inhibit == 0) && (grp->extobj != NULL) && (grp->extobj->attr_edit_post != NULL))
 		grp->extobj->attr_edit_post(grp, key);
 }