Index: trunk/src/libcschem/common_types.h
===================================================================
--- trunk/src/libcschem/common_types.h	(revision 568)
+++ trunk/src/libcschem/common_types.h	(revision 569)
@@ -3,6 +3,8 @@
 
 #include "libcschem/config.h"
 
+typedef struct csch_chdr_s  csch_chdr_t;
+
 typedef csch_sint32_t csch_oid_t;
 #define CSCH_INVALID_OID ((csch_oid_t)(0))
 #define CSCH_MAX_OID ((csch_oid_t)0x7FFFFFFF)
Index: trunk/src/libcschem/concrete.h
===================================================================
--- trunk/src/libcschem/concrete.h	(revision 568)
+++ trunk/src/libcschem/concrete.h	(revision 569)
@@ -30,6 +30,7 @@
 #include "libcschem/common_types.h"
 #include "libcschem/rtree.h"
 #include "libcschem/attrib.h"
+#include "libcschem/vtcnc.h"
 #include <genht/htsp.h>
 #include <genht/htip.h>
 #include "TODO.h"
@@ -50,7 +51,7 @@
 	CSCH_CTYPE_PEN
 } csch_ctype_t;
 
-typedef struct csch_chdr_s {
+struct csch_chdr_s {
 	csch_oid_t oid;
 	csch_ctype_t type;
 	csch_oid_t parent;
@@ -62,13 +63,13 @@
 	csch_cpen_t *pen;
 	csch_sheet_t *sheet;
 	csch_rtree_box_t bbox;
-} csch_chdr_t;
+};
 
 #include "libcschem/vtoid.h"
 
 typedef struct csch_cgrp_s { /* type=CSCH_CTYPE_GRP */
 	csch_chdr_t hdr;
-	csch_vtoid_t memb;
+	csch_vtcnc_t memb;
 	double rot;
 	csch_coord_t xc, yc, x, y;
 } csch_cgrp_t;
Index: trunk/src/libcschem/vtcnc.c
===================================================================
--- trunk/src/libcschem/vtcnc.c	(nonexistent)
+++ trunk/src/libcschem/vtcnc.c	(revision 569)
@@ -0,0 +1,3 @@
+#define GVT_DONT_UNDEF
+#include "vtcnc.h"
+#include <genvector/genvector_impl.c>
Index: trunk/src/libcschem/vtcnc.h
===================================================================
--- trunk/src/libcschem/vtcnc.h	(nonexistent)
+++ trunk/src/libcschem/vtcnc.h	(revision 569)
@@ -0,0 +1,20 @@
+#ifndef VTCSCH_CNC_H
+#define VTCSCH_CNC_H
+
+#include <stdlib.h>
+#include <string.h>
+#include "libcschem/common_types.h"
+
+#define GVT(x) csch_vtcnc_ ## x
+
+#define GVT_ELEM_TYPE csch_chdr_t*
+#define GVT_SIZE_TYPE long
+#define GVT_DOUBLING_THRS 4096
+#define GVT_START_SIZE 32
+#define GVT_FUNC
+#define GVT_SET_NEW_BYTES_TO 0
+#include <genvector/genvector_impl.h>
+#define GVT_REALLOC(vect, ptr, size)  realloc(ptr, size)
+#define GVT_FREE(vect, ptr)           free(ptr)
+#include <genvector/genvector_undef.h>
+#endif