=== modified file 'mrp_subproduct/mrp_subproduct.py'
--- mrp_subproduct/mrp_subproduct.py	2009-10-08 08:50:16 +0000
+++ mrp_subproduct/mrp_subproduct.py	2010-04-23 14:48:16 +0000
@@ -63,29 +63,30 @@
          picking_id=super(mrp_production,self).action_confirm(cr, uid, ids)
          for production in self.browse(cr, uid, ids):
              source = production.product_id.product_tmpl_id.property_stock_production.id
-             for sub_product in production.bom_id.sub_products:
-                 qty1 = sub_product.product_qty
-                 qty2 = production.product_uos and production.product_uos_qty or False
-                 if sub_product.subproduct_type=='variable':
-                    if production.product_qty:
-                        qty1 *= production.product_qty / (production.bom_id.product_qty or 1.0)
-                    if production.product_uos_qty:
-                        qty2 *= production.product_uos_qty / (production.bom_id.product_uos_qty or 1.0)
-                 data = {
-                    'name':'PROD:'+production.name,
-                    'date_planned': production.date_planned,
-                    'product_id': sub_product.product_id.id,
-                    'product_qty': qty1,
-                    'product_uom': sub_product.product_uom.id,
-                    'product_uos_qty': qty2,
-                    'product_uos': production.product_uos and production.product_uos.id or False,
-                    'location_id': source,
-                    'location_dest_id': production.location_dest_id.id,
-                    'move_dest_id': production.move_prod_id.id,
-                    'state': 'waiting',
-                    'production_id':production.id
-                 }
-                 sub_prod_ids=self.pool.get('stock.move').create(cr, uid,data)
+             if production.bom_id:
+                 for sub_product in production.bom_id.sub_products:
+                     qty1 = sub_product.product_qty
+                     qty2 = production.product_uos and production.product_uos_qty or False
+                     if sub_product.subproduct_type=='variable':
+                        if production.product_qty:
+                            qty1 *= production.product_qty / (production.bom_id.product_qty or 1.0)
+                        if production.product_uos_qty:
+                            qty2 *= production.product_uos_qty / (production.bom_id.product_uos_qty or 1.0)
+                     data = {
+                        'name':'PROD:'+production.name,
+                        'date_planned': production.date_planned,
+                        'product_id': sub_product.product_id.id,
+                        'product_qty': qty1,
+                        'product_uom': sub_product.product_uom.id,
+                        'product_uos_qty': qty2,
+                        'product_uos': production.product_uos and production.product_uos.id or False,
+                        'location_id': source,
+                        'location_dest_id': production.location_dest_id.id,
+                        'move_dest_id': production.move_prod_id.id,
+                        'state': 'waiting',
+                        'production_id':production.id
+                     }
+                     sub_prod_ids=self.pool.get('stock.move').create(cr, uid,data)
          return picking_id
 
 mrp_production()