BUTIL -CLONE gives invalid filename error

Question

So I have a corrupt .btr file (filename is FINAN.BTR) that I'm trying to recover. This is possible by using the following commands:

BUTIL -CLONE CORRUPT.NEW CORRUPT.BTR
BUTIL -COPY CORRUPT.BTR CORRUPT.NEW
REN CORRUPT.BTR CORRUPT.OLD
REN CORRUPT.NEW CORRUPT.BTR

However, when I run BUTIL -CLONE CORRUPT.NEW FINAN.BTR, I get the following output:

BUTIL-14: The file that caused the error is FINAN.BTR.
BUTIL-100: MicroKernel error = 11. The specified filename is invalid.

The FINAN.BTR is the corrupt file. The directory of the terminal window is the same directory as the FINAN.BTR file. When I use TAB to autocomplete the filename, it autocomplete FINAN.BTR so the filename and terminal directory are definitely correct. I'm using Windows 11.

Answer 1

I moved the FINAN.BTR file to the root of my hard drive (c:) and opened a new terminal window at that location which somehow fixed the issue. I don't know why it worked that way since the only difference now is the location of the file and the terminal which were both correct.