[quote="searcher123"]
This very old bug is a bug of Paleolith era 
If you want to solve it yourself, use your code in MS-DOS Batch Function mode or change it to follow:
@runmode hide
@runonce @set dirr={dlgstringS|Nom du dossier d'extraction...|{file|noext}}
"/home\tools\cabwiz\MSCEInf.exe" {filepath} extract ".\{$dirr}"
If you want more detail, have a look at Assign selected file/foldername as a value to a variable? too.
Regards[/quote]
Many thanks for this workaround...