The notice about closing smv.exe is hinting that your AV might have flagged it . Create an exclusion in your Antivirus for the folder the tool is working in. Since smv.exe is only the helper, closing it won't close the tool. Delete the small SVF and ISO files (not the EVAL one!) and try again after excluding the folder.
@Enthousiast i got it right that the new Server 2016 SVFs replace the old ones, this time basing on an actually available EVAL?
As said: DO NOT DELETE THE EVAL! The tool will recognize and only check the hash, if matches it will proceed to download the SVF to create the real LTSB ISO.
Both server 2016 sets are made directly EVAL > Full ISO, mkuba50 posted working non refresh eval links, and i made the new set for the refresh EVAL > Full ISO.
Again same error i will try to run the OS on another pc. Cause this Windows 1511 throws me error after SFC/scannow, and when trying to do the DISM restore health online or offline, throws error.... So ill try on another pc.
Nope i didn't delete the evaluation OS, just do the same process of check+dowload, thats it. but it prompt error again, so i will copy the evaluation+SVF2ISO tool and try in other pc.
Another note since the SVF file was ways to small, any over-active firewall running? It was reported that might cause the download to fail and apparently the ISO creation will fail likewise.
Downloading from the SVF Repos by @Enthousiast is kinda complicated and needed a little bash solution by @mkuba50 to make this possible. Some Firewalls/AVs tend to distrust/block this .