Index: trunk/src_plugins/export_stl/model_load_amf.c
===================================================================
--- trunk/src_plugins/export_stl/model_load_amf.c	(nonexistent)
+++ trunk/src_plugins/export_stl/model_load_amf.c	(revision 35962)
@@ -0,0 +1,39 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  pcb-rnd, interactive printed circuit board design
+ *  Copyright (C) 2020 Tibor 'Igor2' Palinkas
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Contact:
+ *    Project page: http://repo.hu/projects/pcb-rnd
+ *    lead developer: http://repo.hu/projects/pcb-rnd/contact.html
+ *    mailing list: pcb-rnd (at) list.repo.hu (send "subscribe")
+ */
+
+#include <stdio.h>
+
+#ifdef PCB_HAVE_LIBXML2
+stl_facet_t *amf_solid_fload(rnd_hidlib_t *hl, FILE *f)
+{
+	return NULL;
+}
+#else
+stl_facet_t *amf_solid_fload(rnd_hidlib_t *hl, FILE *f)
+{
+	return &stl_format_not_supported;
+}
+#endif
Index: trunk/src_plugins/export_stl/stl_models.c
===================================================================
--- trunk/src_plugins/export_stl/stl_models.c	(revision 35961)
+++ trunk/src_plugins/export_stl/stl_models.c	(revision 35962)
@@ -175,7 +175,10 @@
 	memcpy(dst, tmp, sizeof(tmp));
 }
 
+static stl_facet_t stl_format_not_supported;
+
 #include "model_load_stl.c"
+#include "model_load_amf.c"
 
 static void stl_model_place(rnd_hidlib_t *hl, FILE *outf, htsp_t *models, const char *name, rnd_coord_t ox, rnd_coord_t oy, double rotdeg, int on_bottom, const char *user_xlate, const char *user_rot, double maxy, rnd_coord_t z0, rnd_coord_t z1)
 {
@@ -189,6 +192,8 @@
 			head = stl_solid_fload(hl, f);
 			if (head == NULL)
 				rnd_message(RND_MSG_ERROR, "STL model failed to load: %s\n", full_path);
+			else if (head == &stl_format_not_supported)
+				head = NULL;
 		}
 		else
 			rnd_message(RND_MSG_ERROR, "STL model not found: %s\n", name);