Isn't it the case that on newer systems STI014 can be switched off,
and information is carried in STI101 instead? This is certainly the
case on our system in Oxford, where there is no channel named 'STI
014', but STI101 carries all the trigger information.
If this is the case, Jeff, you could use mne_rename_channels to rename
STI101 to STI 014, and then MNE will recognise the trigger channel OK.
Instructions are at the bottom of this page:
Thanks for the ideas. The -noextras option worked perfectly. The file was
processed only with mne_browse_raw, and I think all I did was add a
user-defined event at time 0 and change the filter options. The original
data file did have the STI channels (including 014), but the postprocessed
file didn't have any of those. Not sure what I did to remove it. In any
case, seems to be working well now, and there was no information in the
trigger channel anyway.