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[drake008]

Well I get always errors when rebuilding the TOSEC-ISO set. It seems that I have to long filenames in it. Can you program clrmamepro so that it utilize longer filenames or isn'T that possible?

[Roman]

Generally you got a maximum path name limit given by Windows, which is defined as something around 260 characters. However you can switch to UNC style path which the windows api supports, too and then you can have up to 32k characters....this can be achieved by using a "\\?\" prefix in the pathname.

[drake008]

How can I enter this command? Is it from Clrmamepro or is this complete different?

[Roman]

it's not a command...it's a prefix for pathnames

for example: \\?\e:\mame\roms\neogeo instead of just e:\mame\roms\neogeo

[oxyandy]

If you keep CMP & your set root folder names as short as possible it may help your problem
D:/cmp
D:/set

[coccola]

https://www.howtogeek.com/266621/how-to-make-windows-10-accept-file-paths-over-260-characters/

[Roman]

Actually there is no registry hacking needed when using unc style path names....

[oxyandy]

Roman does CMP use this method when it is doing internal operations
such as extracting a file from an archive into the temp directory ?

[Roman]

This is not a method. It's simply what you specified as path for example: \\?\e:\mame\roms\neogeo instead of just e:\mame\roms\neogeo