Quick bump, the script doesn't work on the file named "999". Does it have data or is it metadata or something similar? http://www.filedropper.com/iavbase
Some files here also don't work, 20XXX is audio.
UPDATE: it is
Can't read 1 bytes from offset 01300000.
Anyway don't worry, it's possible that the BMS script has been written
to exit in this way if it's reached the end of the archive so check it
or contact its author or verify that all the files have been extracted.
Please check the following coverage information to know if it's ok.
coverage file 0 41% 298 714 . offset 01300000
Last script line before the error or that produced the error:
17 get FLAGS byte # 0x81