--- a/LADCPproc.bestLag
+++ b/LADCPproc.bestLag
@@ -1,9 +1,9 @@
 #======================================================================
 #                    L A D C P P R O C . B E S T L A G 
 #                    doc: Tue Sep 28 21:58:48 2010
-#                    dlm: Wed Mar 19 21:33:30 2014
+#                    dlm: Sat Jul 19 18:32:26 2014
 #                    (c) 2010 A.M. Thurnherr
-#                    uE-Info: 28 45 NIL 0 0 72 2 2 4 NIL ofnI
+#                    uE-Info: 29 44 NIL 0 0 72 2 2 4 NIL ofnI
 #======================================================================
 
 # TODO:
@@ -26,6 +26,7 @@
 #	Oct 19, 2012: - BUG: opt_i had wrong sign!
 #	Jun 25, 2013: - adapted to :: %PARAM convention
 #	Mar 19, 2014: - moved %PARAM to LADCPproc
+#	Jul 19, 2014: - made lagging obey -z)oom
 
 sub interp_LADCP_w($$)
 {
@@ -181,7 +182,7 @@
 		$best_lag = $i if ($nBest{$i} > $nBest{$best_lag});
 	}
 	croak("\n$0: cannot determine a valid lag\n")
-		unless ($nBest{$best_lag} > $opt_n/3);
+		unless ($opt_z || $nBest{$best_lag}>$opt_n/3);
 	print(STDERR "\n\n\t\tWARNING: only $nBest{$best_lag} of the lag estimates agree!\n")
 		if ($nBest{$best_lag} < $opt_n/2);