There is a confirmed bug in certain Microsoft Office security patches that were released on Nov 12, 2019 that can cause some operations in MusicMaster to display an error message ‘Query is Corrupt’. Specifically KB4484127, KB4484119, and KB4484113 are affected. Removal of these updates will resolve the issue. It can also be avoided by adding ADE=0 to the [Options] section of MusicMaster.ini. The fix for this issue is currently planned to be released via Windows Update on Dec 10, 2019. If you are experiencing this issue and would like assistance, please contact MusicMaster support.