Index: trunk/src_plugins/cam/cam.conf
===================================================================
--- trunk/src_plugins/cam/cam.conf	(revision 27683)
+++ trunk/src_plugins/cam/cam.conf	(revision 27684)
@@ -26,8 +26,8 @@
 						write %base%.asb=bottom-virtual(purpose=assy)
 						write %base%.fab=virtual(purpose=fab)
 						plugin excellon
-						write %base%.drd=virtual(purpose=pdrill)
-						write %base%.dru=virtual(purpose=udrill)
+						write %base%.drd=[okempty] virtual(purpose=pdrill)
+						write %base%.dru=[okempty] virtual(purpose=udrill)
 					}
 					{gerber:fixed_topbottom} {
 						desc gerber export almost compatible with old 'fixed' naming style, with special casing top and bottom copper
@@ -46,8 +46,8 @@
 						write %base%.bottomassy.gbr=bottom-virtual(purpose=assy)
 						write %base%.fab.gbr=virtual(purpose=fab)
 						plugin excellon
-						write %base%.plated-drill.cnc=virtual(purpose=pdrill)
-						write %base%.unplated-drill.cnc=virtual(purpose=udrill)
+						write %base%.plated-drill.cnc=[okempty] virtual(purpose=pdrill)
+						write %base%.unplated-drill.cnc=[okempty] virtual(purpose=udrill)
 					}
 					{gerber:fixed} {
 						desc gerber export almost compatible with old 'fixed' - top and bottom copper are not special cased but numbered from group0 (top)
@@ -66,8 +66,8 @@
 						write %base%.bottomassy.gbr=bottom-virtual(purpose=assy)
 						write %base%.fab.gbr=virtual(purpose=fab)
 						plugin excellon
-						write %base%.plated-drill.cnc=virtual(purpose=pdrill)
-						write %base%.unplated-drill.cnc=virtual(purpose=udrill)
+						write %base%.plated-drill.cnc=[okempty] virtual(purpose=pdrill)
+						write %base%.unplated-drill.cnc=[okempty] virtual(purpose=udrill)
 					}
 					{gerber:universal} {
 						desc gerber export compatible with old 'univeral' include group name and suffix with eagle-like extensions
@@ -84,8 +84,8 @@
 						write %base%.%name%.gko=boundary
 						write %base%.fab=virtual(purpose=fab)
 						plugin excellon
-						write %base%.drl=virtual(purpose=pdrill)
-						write %base%_NPTH.drl=virtual(purpose=udrill)
+						write %base%.drl=[okempty] virtual(purpose=pdrill)
+						write %base%_NPTH.drl=[okempty] virtual(purpose=udrill)
 					}
 					{gerber:OSH_Park} {
 						desc gerber export compatible with OSH Park's recommendations
@@ -104,7 +104,7 @@
 						write %base%.asb=bottom-virtual(purpose=assy)
 						write %base%.fab=virtual(purpose=fab)
 						plugin excellon
-						write %base%.xln=virtual(purpose=pdrill),virtual(purpose=udrill)
+						write %base%.xln=[okempty] virtual(purpose=pdrill),virtual(purpose=udrill)
 					}
 					{gerber:Seeed} {
 						desc gerber export compatible with Seeed Studio's recommendations
@@ -123,7 +123,7 @@
 						write %base%.ASB=bottom-virtual(purpose=assy)
 						write %base%.FAB=virtual(purpose=fab)
 						plugin excellon
-						write %base%.TXT=virtual(purpose=pdrill),virtual(purpose=udrill)
+						write %base%.TXT=[okempty] virtual(purpose=pdrill),virtual(purpose=udrill)
 					}
 # JLC job tested and contributed by keantoken
 					{gerber:JLC_PCB} {
@@ -143,7 +143,7 @@
 						write %base%.asb=bottom-virtual(purpose=assy)
 						write %base%.fab=virtual(purpose=fab)
 						plugin excellon
-						write %base%.xln=virtual(purpose=pdrill),virtual(purpose=udrill),mech(purpose=proute),mech(purpose=uroute)
+						write %base%.xln=[okempty] virtual(purpose=pdrill),virtual(purpose=udrill),mech(purpose=proute),mech(purpose=uroute)
 					}
 
 # protel job tested and contributed by keantoken
@@ -164,7 +164,7 @@
 						write %base%.asb=bottom-virtual(purpose=assy)
 						write %base%.fab=virtual(purpose=fab)
 						plugin excellon
-						write %base%.xln=virtual(purpose=pdrill),virtual(purpose=udrill)
+						write %base%.xln=[okempty] virtual(purpose=pdrill),virtual(purpose=udrill)
 					}
 
 					{gerber:PCBWay} {
@@ -181,7 +181,7 @@
 						write %base%-solderpaste_bottom.gbr=bottom-paste
 						write %base%-profile.gbr=boundary
 						plugin excellon
-						write %base%-drills.xln=virtual(purpose=pdrill),virtual(purpose=udrill)
+						write %base%-drills.xln=[okempty] virtual(purpose=pdrill),virtual(purpose=udrill)
 					}
 
 					{gerber:Elecrow} {
@@ -199,8 +199,8 @@
 						write %base%.FAB=virtual(purpose=fab)
 						write %base%.GL%top_offs+1%=intern-copper
 						plugin excellon
-						write %base%.TXT=virtual(purpose=pdrill)
-						write %base%-NPTH.txt=virtual(purpose=udrill)
+						write %base%.TXT=[okempty] virtual(purpose=pdrill)
+						write %base%-NPTH.txt=[okempty] virtual(purpose=udrill)
 					}
 
 					{gerber:orcad} {
@@ -220,8 +220,8 @@
 #						write %base%.asb=bottom-virtual(purpose=assy)
 #						write %base%.fab.gbr=virtual(purpose=fab)
 						plugin excellon
-						write %base%.thruhole.tap=virtual(purpose=pdrill)
-						write %base%.thruhole-unplated.tap=virtual(purpose=udrill)
+						write %base%.thruhole.tap=[okempty] virtual(purpose=pdrill)
+						write %base%.thruhole-unplated.tap=[okempty] virtual(purpose=udrill)
 					}
 				}
 			}