From c48b41d76e8203b92a7f2f144c72d5e2d01176d7 Mon Sep 17 00:00:00 2001
From: Bryce Willey <Bryce.Steven.Willey@gmail.com>
Date: Tue, 3 Oct 2023 17:50:38 -0400
Subject: [PATCH] check system version before trying to replace font

---
 docassemble_base/docassemble/base/pdftk.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docassemble_base/docassemble/base/pdftk.py b/docassemble_base/docassemble/base/pdftk.py
index 3243d534d..1ba298fce 100644
--- a/docassemble_base/docassemble/base/pdftk.py
+++ b/docassemble_base/docassemble/base/pdftk.py
@@ -6,6 +6,7 @@
 import string
 import codecs
 import logging
+import packaging
 from io import BytesIO
 from xfdfgen import Xfdf
 import pikepdf
@@ -238,6 +239,11 @@ def fill_template(template, data_strings=None, data_names=None, hidden=None, rea
             font_arguments = ['replacement_font', replacement_font]
         else:
             font_arguments = DEFAULT_FONT_ARGUMENTS
+        system_version = daconfig.get('system version', 'Unknown')
+        if system_version == 'Unknown' or packaging.version.parse(system_version) < packaging.version.parse("1.4.73"):
+          if replacement_font:
+              logmessage("Warning: the `replacement_font` argument isn't supported without a system docassemble of 1.4.73 or above")
+          font_arguments = []
         subprocess_arguments = [PDFTK_PATH, template, 'fill_form', fdf_file.name, 'output', pdf_file.name] + font_arguments
         # logmessage("Arguments are " + str(subprocess_arguments))
         if len(images) > 0: