From 0440aaf3a907fe6dfa96fe3fb66d782082b53db4 Mon Sep 17 00:00:00 2001
From: tferr <tiago.tferr@gmail.com>
Date: Fri, 28 Oct 2022 13:13:17 -0400
Subject: [PATCH] Bugfix: NPE in StrahlerCmd

---
 src/main/java/sc/fiji/snt/plugin/StrahlerCmd.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main/java/sc/fiji/snt/plugin/StrahlerCmd.java b/src/main/java/sc/fiji/snt/plugin/StrahlerCmd.java
index ecf64d6f9..9acc644a0 100644
--- a/src/main/java/sc/fiji/snt/plugin/StrahlerCmd.java
+++ b/src/main/java/sc/fiji/snt/plugin/StrahlerCmd.java
@@ -228,6 +228,7 @@ private CategoryChart getSingleTreeChart(final StrahlerData sd) throws IllegalAr
 	 */
 	public SNTChart getChart() {
 		if (trees.size() == 1) {
+			initMap();
 			final Entry<String, StrahlerData> entry = dataMap.entrySet().iterator().next();
 			return new SNTChart("Strahler Plot " + entry.getKey(), getSingleTreeChart(entry.getValue()));
 		}