[Q] Unbrick Galaxy Ace... Urgent

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overwrites the file "vold.fstab" ace of the galaxy by galaxy w in the attempt to "swap memory" but it did not work, right after I changed my rom, so the phone is bricked, so I could start the download with the aid of a jig usb, but still the odin does not start when I open it and the recovery appears:
"- Appling Muti-CSC -
And: failed to mount / system (invalid argument) "

WHAT do I do?

Help Pls

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Someone help me pls