The books I was converting was in Mobipocket format. I converted it to LRF and then I wanted to convert it to LRS.
I was trying to convert this LRF to LRS and received the following error.
lrf2lrs "Star Trek - TNG - Destiny Book II Mere Mortals.lrf"
Traceback (most recent call last):
File "lrfparser.py", line 161, in <module>
File "lrfparser.py", line 156, in main
File "lrfparser.py", line 93, in to_xml
IOError: [Errno 2] No such file or directory: u'Star Trek\xae: Destiny: Mere Mortals_thumbnail.jpeg'