Hi edge914, thanks for you reply.
I've discovered where the problem is started: i use a ramdisk (imdisk) and set the temp folder on it.
For reasons that i ignore the temp forder cause a problem during a file extraction.So i decide to remove it and extract in a new folder from a windows iso the files: in this manner the mounting process with ntlite works well. Later i try with a update version of ramdisk and test it.
Nothing to do Nuhi, maybe it's too difficult for me to apply the remedies suggested in the forum. I tried to use a backup image of the system I created some time ago with acronis true image, applying it to disk c: and formatting the disk d: (where I keep the original iso files of windows and other personal data that I saved on a 'other external disk). As soon as I try to load an image from an unpacked ISO file with 7zip with Ntlite, the system blocks the upload indicating the notorious error 18: out of files.
The only thing I noticed strange about the extracted iso folder is that it keeps the read-only file feature.
I have tried in many ways to remove that state but to no avail, the folder remains read-only. Any suggestions to solve this problem?