Instance Generation Does Not Open from LRP

CDM 20.10.3+

When generating an SEC project that does not use inline XBRL, the generation (Generate Instance Document) may be successful but not open from the LRP.

This issue is caused by the presence of a file from an older version of Arelle.

To resolve the issue, either:

• Delete the file _classic_test.mplstyle from the default Arelle folder. Location of the file is C:\Program Files\Arelle\lib\matplotlib\mpl-data\stylelib\_classic_test.mplstyle.
• Uninstall the dependencies, delete the default Arelle folder and then reinstall the XBRL dependencies (version - 20.6.1.1 or newer version). This will install Arelle and the file that is causing the issue will not be available.