> You gave the solution already yourself.
> The 'new name file' already exists and so it can't be renamed.
>
> ...btw...there is no real reason to keep such file not compressed (and for
> zipped sets, cmpro supports circular renames...)
>
>
> Roman Scherzer
>
Hi roman...

I think it's better to uncompress the pics.
In your front-end or mameui, the display of the snap will be faster, really, faster..
This could be usefull for people who have small spec.
Sure, a big PC, the gain will be small.
But try, the is difference.

Keep them compressed is more easy for a clrmamepro profile (only needed to set the zipfile folder as rompath)

But it's better to :
- Extract your snapshots in your pics folder
- set mame folder as rompath and
- add in Exclude-path all folders that are in mame folder but your pics folder
- add in unneeded mask all files extension that are in mame folder

...