Index: trunk/src_plugins/export_openems/mesh.c
===================================================================
--- trunk/src_plugins/export_openems/mesh.c	(revision 26662)
+++ trunk/src_plugins/export_openems/mesh.c	(revision 26663)
@@ -1026,7 +1026,7 @@
 		mesh_vis_z(&mesh);
 
 	free(mesh.ui_name_xy);
-	free(mesh.ui_layer_xy->name);
+	free((char *)mesh.ui_layer_xy->name); /* we have strdup'd it */
 	mesh.ui_name_xy = pcb_strdup_printf("mesh 0: %s", mesh.layer->name);
 	mesh.ui_layer_xy->name = pcb_strdup(mesh.ui_name_xy);
 	pcb_event(&PCB->hidlib, PCB_EVENT_LAYERS_CHANGED, NULL);