Index: eps.c
===================================================================
--- eps.c	(revision 29222)
+++ eps.c	(revision 29223)
@@ -348,7 +348,7 @@
 
 	if (pcb_cam_end(&eps_cam) == 0)
 		if (!eps_cam.okempty)
-			pcb_message(PCB_MSG_ERROR, "eps cam export for '%s' failed to produce any content\n", options[HA_cam].str);
+			pcb_message(PCB_MSG_ERROR, "eps cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 }
 
 static int eps_parse_arguments(pcb_hid_t *hid, int *argc, char ***argv)
Index: ps.c
===================================================================
--- ps.c	(revision 29222)
+++ ps.c	(revision 29223)
@@ -662,7 +662,7 @@
 
 	if (pcb_cam_end(&ps_cam) == 0)
 		if (!ps_cam.okempty)
-			pcb_message(PCB_MSG_ERROR, "ps cam export for '%s' failed to produce any content\n", options[HA_cam].str);
+			pcb_message(PCB_MSG_ERROR, "ps cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 }
 
 static int ps_parse_arguments(pcb_hid_t *hid, int *argc, char ***argv)