Rarely, the local GRS lock table becomes corrupted, causing a resource to appear permanently locked. When a routine scans the table for an exclusive lock entry on MVSKEY.x and finds none (even though it should exist), the error is raised.
If your emulator throws the "ROM mvsc.key was not found" error, it means your game archive ( mvsc.zip ) or your parent arcade BIOS files are either outdated, badly scraped, or missing the dedicated decryption key entirely. Why Is the "Exclusive Lock" Broken?
Rarely, the local GRS lock table becomes corrupted, causing a resource to appear permanently locked. When a routine scans the table for an exclusive lock entry on MVSKEY.x and finds none (even though it should exist), the error is raised.
If your emulator throws the "ROM mvsc.key was not found" error, it means your game archive ( mvsc.zip ) or your parent arcade BIOS files are either outdated, badly scraped, or missing the dedicated decryption key entirely. Why Is the "Exclusive Lock" Broken?