Index: trunk/src/hid_cam.c
===================================================================
--- trunk/src/hid_cam.c	(revision 29225)
+++ trunk/src/hid_cam.c	(revision 29226)
@@ -251,8 +251,10 @@
 				*next = '\0';
 				next++;
 			}
-			if (strcmp(curr, "okempty") == 0)
-				dst->okempty = 1;
+			if (strcmp(curr, "okempty") == 0) {
+				dst->okempty_group = 1;
+				dst->okempty_content = 1;
+			}
 			else
 				pcb_message(PCB_MSG_ERROR, "CAM: ignoring unknown global parameter [%s]\n", curr);
 		}
Index: trunk/src/hid_cam.h
===================================================================
--- trunk/src/hid_cam.h	(revision 29225)
+++ trunk/src/hid_cam.h	(revision 29226)
@@ -19,8 +19,8 @@
 	pcb_xform_t *vxform[PCB_VLY_end];
 	pcb_xform_t vxform_[PCB_VLY_end];
 
-	unsigned int okempty_content:1; /* do not warn if no objects exported */
-	unsigned int okempty:1;         /* do not warn if no group/object exported */
+	unsigned int okempty_content:1; /* do not warn if no objects exported (but group exists) */
+	unsigned int okempty_group:1;   /* do not warn if no group exported */
 
 	/* private/internal/cache */
 	const char *fn_template;
Index: trunk/src_plugins/export_dxf/dxf.c
===================================================================
--- trunk/src_plugins/export_dxf/dxf.c	(revision 29225)
+++ trunk/src_plugins/export_dxf/dxf.c	(revision 29226)
@@ -335,7 +335,7 @@
 	fclose(dxf_ctx.f);
 
 	if (pcb_cam_end(&dxf_cam) == 0)
-		if (!dxf_cam.okempty)
+		if (!dxf_cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "dxf cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 }
 
Index: trunk/src_plugins/export_excellon/excellon.c
===================================================================
--- trunk/src_plugins/export_excellon/excellon.c	(revision 29225)
+++ trunk/src_plugins/export_excellon/excellon.c	(revision 29226)
@@ -287,7 +287,7 @@
 	}
 
 	if (pcb_cam_end(&excellon_cam) == 0)
-		if (!excellon_cam.okempty)
+		if (!excellon_cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "excellon cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 
 	pcb_drill_uninit(&pdrills);
Index: trunk/src_plugins/export_gcode/gcode.c
===================================================================
--- trunk/src_plugins/export_gcode/gcode.c	(revision 29225)
+++ trunk/src_plugins/export_gcode/gcode.c	(revision 29226)
@@ -362,7 +362,7 @@
 	}
 
 	if (pcb_cam_end(&gctx.cam) == 0)
-		if (!gctx.cam.okempty)
+		if (!gctx.cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "gcode cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 }
 
Index: trunk/src_plugins/export_gerber/gerber.c
===================================================================
--- trunk/src_plugins/export_gerber/gerber.c	(revision 29225)
+++ trunk/src_plugins/export_gerber/gerber.c	(revision 29226)
@@ -674,7 +674,7 @@
 	}
 
 	if (pcb_cam_end(&gerber_cam) == 0)
-		if (!gerber_cam.okempty)
+		if (!gerber_cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "gerber cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 
 	pcb_drill_uninit(&pdrills);
Index: trunk/src_plugins/export_png/png.c
===================================================================
--- trunk/src_plugins/export_png/png.c	(revision 29225)
+++ trunk/src_plugins/export_png/png.c	(revision 29226)
@@ -782,7 +782,7 @@
 
 pcb_trace("EMPTY: %ld %d\n", png_drawn_objs, png_cam.okempty_content);
 	if (pcb_cam_end(&png_cam) == 0) {
-		if (!png_cam.okempty)
+		if (!png_cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "png cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 	}
 	else if (png_drawn_objs == 0)
Index: trunk/src_plugins/export_ps/eps.c
===================================================================
--- trunk/src_plugins/export_ps/eps.c	(revision 29225)
+++ trunk/src_plugins/export_ps/eps.c	(revision 29226)
@@ -347,7 +347,7 @@
 	fclose(f);
 
 	if (pcb_cam_end(&eps_cam) == 0)
-		if (!eps_cam.okempty)
+		if (!eps_cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "eps cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 }
 
Index: trunk/src_plugins/export_ps/ps.c
===================================================================
--- trunk/src_plugins/export_ps/ps.c	(revision 29225)
+++ trunk/src_plugins/export_ps/ps.c	(revision 29226)
@@ -661,7 +661,7 @@
 	}
 
 	if (pcb_cam_end(&ps_cam) == 0)
-		if (!ps_cam.okempty)
+		if (!ps_cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "ps cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 }
 
Index: trunk/src_plugins/export_svg/svg.c
===================================================================
--- trunk/src_plugins/export_svg/svg.c	(revision 29225)
+++ trunk/src_plugins/export_svg/svg.c	(revision 29226)
@@ -365,7 +365,7 @@
 	f = NULL;
 
 	if (pcb_cam_end(&svg_cam) == 0)
-		if (!svg_cam.okempty)
+		if (!svg_cam.okempty_group)
 			pcb_message(PCB_MSG_ERROR, "svg cam export for '%s' failed to produce any content (layer group missing)\n", options[HA_cam].str);
 }