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• I have searched the existing issues and did not find a duplicate.
• I am using a Python virtual environment.
• I have confirmed this is a PyFluent issue, not a problem with Ansys Fluent. See the posting issues guide.

📝 Description of the bug

When calling SettingsReader(settings_file_name='...') for a large settings file with lots of species, the operation hangs.

🔁 Steps to reproduce

from ansys.fluent.core.filereader.case_file import SettingsFile as SettingsReader
reader = SettingsReader(settings_file_name='test.settings')

🎯 Expected behavior

Read the settings file without hanging

💥 Actual behavior / traceback

The operating hangs. There is no traceback.

📦 PyFluent version

0.39.1

🌀 Ansys Fluent version

2027 R1 (27.1)

🐍 Python version

3.13

💻 Operating system

Windows

📌 Additional context

Please contact me for a settings file to reproduce the issue, if required