MPC Software & MPC Beats Forum: Bug reports, feature suggestions and discussion for the MPC Software and the free 'MPC Beats' application for Mac/PC. If you have hardware-specific questions, please post in the relevant MPC sub-forum.
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By MPC-Tutor Thu Jan 13, 2022 3:57 pm
I'm not aware of any existing bug where projects just suddenly lose files, instead this would indicate you've either deleted some files within the project folder (difficult to do accidentally), or you have disk corruption at play (thus making some of the sounds inaccessible to the MPC).

Locate the 'projectData' folder for the problematic project, enter it and see if you can salvage anything from inside it and then try adding that data back into a new project. Also, try saving to a different disk, just to rule out disk corruption.