[aaronkanzer]

write_BIDS_probe fails on any probe that has wiring with more than one channel:

from probeinterface import generate_linear_probe, write_BIDS_probe, read_BIDS_probe
p = generate_linear_probe(num_elec=4)
p.annotate(type="laminar")
p.set_device_channel_indices([3, 2, 1, 0])
write_BIDS_probe("out", p)

Observed:

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

Expected: the files are written, and read_BIDS_probe("out").probes[0].device_channel_indices returns [3 2 1 0].

Cause: the writer checks if probe.device_channel_indices:, but that attribute is a numpy array or None. Only unwired probes and single-contact probes could be written.

Fix: check is not None instead. The reader already restores the device_channel_indices column through Probe.from_dataframe, so the round trip works once the writer stops crashing. Adds a round-trip test with a wired probe.

[alejoe91]

Thanks!