From 63ad2b0b0fd721107be40bbe39f2a06aaaceefd8 Mon Sep 17 00:00:00 2001
From: Dave Doty <doty@ucdavis.edu>
Date: Thu, 5 Dec 2024 17:32:57 -0800
Subject: [PATCH] fixes #1004: import (previously exported) cadnano design with
 paranemic crossover

This reverts commit f827627312ac51f9afa45fc1d23d5e290fbde43d.
---
 lib/src/middleware/export_cadnano_file.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/src/middleware/export_cadnano_file.dart b/lib/src/middleware/export_cadnano_file.dart
index bc2625ed..fe44ef13 100644
--- a/lib/src/middleware/export_cadnano_file.dart
+++ b/lib/src/middleware/export_cadnano_file.dart
@@ -358,7 +358,7 @@ have different parity of row number: respectively ${helix_from_dct['row']} and $
   } else if (!forward_from && !forward_to) {
     helix_from_dct[strand_type][start_from]
         .setRange(2, helix_from_dct[strand_type][start_from].length, [helix_to, end_to - 1]);
-    helix_to_dct[strand_type][start_to].setRange(0, 2, [helix_from, end_from - 1]);
+    helix_to_dct[strand_type][end_to - 1].setRange(0, 2, [helix_from, start_from]);
     if (helix_from_dct['row'] % 2 != helix_to_dct['row'] % 2) {
       throw new IllegalCadnanoDesignError('''\
 Paranemic crossovers are only allowed between helices that have the same parity of