Index: mesh.c
===================================================================
--- mesh.c	(revision 32011)
+++ mesh.c	(revision 32012)
@@ -1029,13 +1029,11 @@
 	ia_load_file(fname);
 }
 
-static void ia_gen_cb(void *hid_ctx, void *caller_data, rnd_hid_attribute_t *attr)
+static void ia_gen(void)
 {
 	mesh_layer_reset();
 	mesh.layer = PCB_CURRLAYER(PCB);
 
-	dlg2mesh();
-
 	if (ia.dlg[ia.hor].val.lng)
 		mesh_auto(&mesh, PCB_MESH_HORIZONTAL);
 	if (ia.dlg[ia.ver].val.lng)
@@ -1054,6 +1052,13 @@
 	rnd_gui->invalidate_all(rnd_gui);
 }
 
+static void ia_gen_cb(void *hid_ctx, void *caller_data, rnd_hid_attribute_t *attr)
+{
+
+	dlg2mesh();
+	ia_gen();
+}
+
 pcb_mesh_t *pcb_mesh_get(const char *name)
 {
 	return &mesh;
Index: openems_xml.c
===================================================================
--- openems_xml.c	(revision 32011)
+++ openems_xml.c	(revision 32012)
@@ -215,7 +215,7 @@
 	fprintf(ctx->f, "    <RectilinearGrid DeltaUnit='0.001' CoordSystem='0'>\n");
 	openems_wr_xml_mesh_lines(ctx, mesh, 'Y', &mesh->line[PCB_MESH_HORIZONTAL], -1);
 	openems_wr_xml_mesh_lines(ctx, mesh, 'X', &mesh->line[PCB_MESH_VERTICAL], 1);
-	openems_wr_xml_mesh_lines(ctx, mesh, 'Z', &mesh->line[PCB_MESH_Z], 1);
+	openems_wr_xml_mesh_lines(ctx, mesh, 'Z', &mesh->line[PCB_MESH_Z], -1);
 	fprintf(ctx->f, "    </RectilinearGrid>\n");
 }