If I have 'Fix Unneeded' checked when I run ClrMAME, the daytona2 set comes up with mpr20887.ic18 flagged as unneeded. When it tries to do the backup it fails and says the file won't be removed. Ihave checked that the back directory exists and is properly specified. If I manually delete the file, ClrMAME wants it back in. What's up with this rom file?