From 4f3b205d93e8f9163b293600170c9099a357ec7a Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@koefferlein.de>
Date: Mon, 12 Feb 2018 22:46:47 +0100
Subject: [PATCH] Fixed #71 (target cell argument is required)

---
 src/drc/drc/built-in-macros/drc.lym | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/drc/drc/built-in-macros/drc.lym b/src/drc/drc/built-in-macros/drc.lym
index a86fb5121..514b59a4d 100644
--- a/src/drc/drc/built-in-macros/drc.lym
+++ b/src/drc/drc/built-in-macros/drc.lym
@@ -4694,11 +4694,20 @@ CODE
       
       else 
 
-        output = @output_layout || @def_layout
-        output || raise("No output layout specified")
-
-        output_cell = @output_cell || @def_cell
-        output_cell || raise("No output cell specified")
+        if @output_layout 
+          output = @output_layout
+          if @output_cell
+            output_cell = @output_cell
+          elsif @def_cell
+            output_cell = @output_layout.cell(@def_cell.name) || @output_layout.create_cell(@def_cell.name)
+          end
+          output_cell || raise("No output cell specified (see 'target' instruction)")
+        else
+          output = @def_layout
+          output || raise("No output layout specified")
+          output_cell = @output_cell || @def_cell
+          output_cell || raise("No output cell specified")
+        end
 
         info = nil
         if args.size == 1