Why do I have so many errors in my log?

[ofrex]

I am using Minimserver with a Melco.
Sometimes the Minimwatch log file contains messages like

Warning: form size extends past end of file in AIFF file import/all/Carlos Kleiber Vienna Philharmonic Orchestra/Wiener_Ph\
ilharmoniker_Carlos_Kleiber-Beethoven_Symphonies_Nos_5_7/01-01-1_Allegro_con_brio-SMR.aif (length 258283630)

The message may or may not appear the next time I rescan, even if have not touched the involved AIFF file.

What does it means ?