jcamp data files start with a long header of 23 lines. this is no problem. Things become more complicated when you reach the actual data. Normally a space is used a delimiter but with negative values the space is omitted. The next series of numbers should be read as one line of a jcamp file.
400.27 2013265920-30091336 31421853 2013265920 2013265920 2013265920

Since jcamp is a standard fileformat for spectral data, I guess maybe someone has encountered this problem before, and solved