Command Line conversion errors

I have been using the command line ebook-convert that comes with Calibre to convert a lot of old .LIT files to .epub to read on my tablet. On a couple of ebooks I am getting an error in LZX decompression, and the conversion fails. However, on the original Microsoft eReader (which I still have, fortunately) the files open fine. Here is the conversion:

G:\mediafiles\eBooks\Sci-Fi and Fantasy Library\E-L\Eddings, David>"c:\users\ewe
ssel\Desktop\Calibre Portable\Calibre\ebook-convert.exe" "Eddings, David - The R
edemption Of Althalus.lit" .epub
1% Converting input to HTML...
InputFormatPlugin: LIT Input running
on G:\mediafiles\eBooks\Sci-Fi and Fantasy Library\E-L\Eddings, David\Eddings, D
avid - The Redemption Of Althalus.lit
Parsing all content...
LZX decompression error; skipping chunk
Failed to parse content in David%20Eddings%20-%20The%20Redemption%20of%20Althalu
s.htm
Spine item 'David_Eddings_-_The_Redemption_of_Althalus' not found
Python function terminated unexpectedly
Spine is empty (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 132, in main
File "site.py", line 109, in run_entry_point
File "site-packages\calibre\ebooks\conversion\cli.py", line 380, in main
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1057, in run
File "site-packages\calibre\customize\conversion.py", line 241, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\lit_inp ut.py", line 23,
in convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1255, in creat
e_oebbook
File "site-packages\calibre\ebooks\oeb\reader.py", line 71, in __call__
File "site-packages\calibre\ebooks\oeb\reader.py", line 696, in _all_from_opf
File "site-packages\calibre\ebooks\lit\reader.py", line 925, in _spine_from_op
f
File "site-packages\calibre\ebooks\oeb\reader.py", line 343, in _spine_from_op
f
calibre.ebooks.oeb.base.OEBError: Spine is empty

and the file I am trying to convert is attached. I don't think it's a DRM issue, just a decompression issue, but I don't know why calibre has problems, but Microsoft's own reader doesn't..