Unable to create WinPE.iso

[neversaynever1]

@neversaynever1 - I'll try and explain.
.........

@froggie - Very clear explanation that helped elevate the low level of my education.
Thank you, I am much more aware now.

@froggie - just FYI.
I used the procedure of creating the .ope file via WinpeDownloader.
I then created with HBS the WinPE.iso via winPE.ope.
The procedure worked perfectly with the non-public version 231213 provided to me by Admin.
I then re-installed the public version 4.0.0 and retried the creation of WinPE.iso via winPE.ope; the process crashed at exactly 63% as before. This means that the crash occurs during the merging of winPE.ope with the software part of HBS. As Admin correctly identified there is something anomalous about the use of Microsoft's copy command in this instance; whereas with the copy routine written by HBS the merge happens regularly.
The solution suggested to me by Froggy, however very useful, does not help in my case.
For now I continue to use the non-public version 231213 while waiting for the next public version.
The question remains as to what causes 'copy' to fail in that situation on one of my machines: but I do not have the knowledge to solve it.
Thanks again.