=== modified file 'data.awk'
--- data.awk	2016-01-07 14:13:23 +0000
+++ data.awk	2015-09-23 01:42:51 +0000
@@ -75,17 +75,6 @@
 }
 
 function loop_start(varname, prefix,    depth) {
-	if(!((varname, "fields") in V)) {
-		if(ENVIRON["DATA_AWK_EMPTY_GET"]) {
-			if(DEBUG) {
-				print "table not found: " varname >"/dev/stderr"
-			}
-			found = ""
-		} else {
-			print "error: undefined table '"varname"'" >"/dev/stderr"
-			exit 1
-		}
-	}
 	depth = ++loop_stack["depth"]
 	loop_stack[depth,"row"] = 0
 	loop_stack[depth,"var"] = varname