diff --git a/src/Add-on/DrawBoard/DrawTopBottomBoard.ts b/src/Add-on/DrawBoard/DrawTopBottomBoard.ts
index 73b81a453..1913e4bdf 100644
--- a/src/Add-on/DrawBoard/DrawTopBottomBoard.ts
+++ b/src/Add-on/DrawBoard/DrawTopBottomBoard.ts
@@ -24,7 +24,12 @@ export class DrawTopBottomBoard implements Command
             let selectSpace = new PointSelectSpaceClamp();
             await selectSpace.Select(() =>
             {
-                BuildTopBottomBoards(store.topBoardOption, store.bottomBoardOption, selectSpace.SpaceParse).forEach(b => JigUtils.Draw(b))
+                if (selectSpace.SpaceParse.ParseOK)
+                {
+                    let brs = BuildTopBottomBoards(store.topBoardOption, store.bottomBoardOption, selectSpace.SpaceParse);
+                    for (let br of brs)
+                        JigUtils.Draw(br);
+                }
             });
             if (!selectSpace.ParseOK)
             {