Memory Allocation List Corrupted

[O'Light]

Hello everyone,
I have a Pearl Tiger with a corruption problem. The console displays regularly the message "Memory Allocation List Corrupted". When it happens, I cannot save the current show.
Even after a rest, a switch off / switch on, a wipe all, the desk still displays the same message during the powering up phase.

Any idea about the possible fault? A solution?

Thank you very much