Fix #493

.github/workflows/python-package.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04 # Temporarily set lower due to missing packages. We'll come back and properly handle this later.
     strategy:
       fail-fast: false
       matrix:

CHANGELOG.md

@@ -1,3 +1,7 @@
+**0.58.1**
+* [[TeamMsgExtractor #493](https://github.com/TeamMsgExtractor/msg-extractor/issues/493)] Fixed unable to open embedded msg files due to `MSGBase.prefixList` still being used after it was removed.
+* Corrected the typing signature of `MSGBase.prefix`.
+
 **v0.58.0**
 * Changed module to primarily use `MSGPath` for pathing. All functions still except string paths or list paths, they now just also accept `MSGPath` and use it under the hood for path conversions. With this, some functions have been changed to specifically return `MSGPath` rather than list and string versions of paths. Removed: `MSGBase.prefixList`, `utils.inputToMsgPath()`, and `utils.msgPathToString()`. Modified: `*.fixPath()`, `*.listDir()`, and `MSGBase.prefix`.
 * Changed setup to use `find_packages()` to try and get ahead of deprecation and ensure all files are distributed correctly.

README.rst

@@ -268,8 +268,8 @@ your access to the newest major version of extract-msg.
 .. |License: GPL v3| image:: https://img.shields.io/badge/License-GPLv3-blue.svg
    :target: LICENSE.txt
 
-.. |PyPI3| image:: https://img.shields.io/badge/pypi-0.58.0-blue.svg
-   :target: https://pypi.org/project/extract-msg/0.58.0/
+.. |PyPI3| image:: https://img.shields.io/badge/pypi-0.58.1-blue.svg
+   :target: https://pypi.org/project/extract-msg/0.58.1/
 
 .. |PyPI2| image:: https://img.shields.io/badge/python-3.8+-brightgreen.svg
    :target: https://www.python.org/downloads/release/python-3810/

extract_msg/__init__.py

@@ -27,8 +27,8 @@
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 __author__ = 'Destiny Peterson & Matthew Walker'
-__date__ = '2026-10-28'
-__version__ = '0.58.0'
+__date__ = '2026-10-31'
+__version__ = '0.58.1'
 
 __all__ = [
     # Modules:

extract_msg/attachments/emb_msg_att.py

@@ -34,7 +34,7 @@ class EmbeddedMsgAttachment(AttachmentBase):
 
     def __init__(self, msg: MSGFile, dir_: str, propStore: PropertiesStore):
         super().__init__(msg, dir_, propStore)
-        self.__prefix = msg.prefixList + [dir_, '__substg1.0_3701000D']
+        self.__prefix = msg.prefix / dir_ / '__substg1.0_3701000D'
         self.__data = openMsg(self.msg.path, prefix = self.__prefix, parentMsg = self.msg, treePath = self.treePath, **self.msg.kwargs)
 
     def getFilename(self, **kwargs) -> str:

extract_msg/msg_classes/msg.py

@@ -1130,7 +1130,7 @@ def path(self):
         return self.__path
 
     @property
-    def prefix(self) -> str:
+    def prefix(self) -> MSGPath:
         """
         The prefix of the ``MSGFile`` instance.