From 3e412609093374ef2ce9d26a9724b2ef6d1b0ca7 Mon Sep 17 00:00:00 2001
From: Jakob Hansen <hansen@civicplus.com>
Date: Sun, 1 Oct 2023 23:32:05 -0500
Subject: [PATCH] wrap pitch access in try/catch

---
 music21/tree/verticality.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/music21/tree/verticality.py b/music21/tree/verticality.py
index 7df4646b3..1efb3b644 100644
--- a/music21/tree/verticality.py
+++ b/music21/tree/verticality.py
@@ -814,8 +814,11 @@ def conditionalAdd(ts, n: note.Note) -> None:
             from music21 import stream
 
             nonlocal pitchBust  # love Py3!!!
-            p = n.pitch
-            pitchKey = p.nameWithOctave
+            try:
+                p = n.pitch
+                pitchKey = p.nameWithOctave
+            except AttributeError:
+                return
 
             pitchGroup = None
             if addPartIdAsGroup: