zachary83 Posted October 30, 2017 Posted October 30, 2017 I use Microsoft Project. When I open .mpp file, Project will show a warning message "Unknown error trying to lock file." Is there an alternative to Project?
Dex Posted October 30, 2017 Posted October 30, 2017 Where are you trying to open it from? Is it a shared file?
jcox3 Posted October 31, 2017 Posted October 31, 2017 OpenOfficeMPP Viewer Tool Google Docs LibreOffice
