Hi there!

I am using SpectraST to create a library on the NIST synthetic HCD dataset 
https://chemdata.nist.gov/dokuwiki/doku.php?id=peptidew:lib:kustersynselected20170530
. 

This is the command I used: ./spectrast -c -cI HCD  
human_synthetic_hcd_selected.msp 

However, i got complaints like the following: 
Importing spectra from .msp library file...
Attempting to calculate M/Z with charge = 0! Assume charge = 1.
...
Attempting to calculate M/Z with charge = 0! Assume charge = 1.


I am not sure what is going on.  Could you please help?

Thanks,
Lei

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