NP headstage probe missing error message

[ChucklesOnGitHub]

In a workflow for NP2.0e with NeuropixelsV2e Device Enabled=True, and a node to stream from Probe A,

• If both probes are physically not connected to the headstage, the error message is explicit:

Mind you, this also happens if the probe device is not enabled NeuropixelsV2e Device Enabled=False (which is why i asked this)

• If only Probe A is physically not connected to the headstage, the error message is more obscure:

[ChucklesOnGitHub]

Attempting to disable the NP Data node to get only the BNO data:

• If both probes are missing, the above error message overlaps with an incorrect message about the PolledBno not having been configured.

• If only one probe is missing, the workflow runs

[bparks13]

For clarification, the message that the PolledBno055 has not been configured is actually correct. The way the library currently works is that the NeuropixelV2e device and the PolledBno055 on the NeuropixelsV2eHeadstage are always configured together, so if the device is disabled the BNO is not configured. This is a known issue: #165

[jonnew]

It sounds like the first portion of this issue boils down to the library misbehaving if only probe B is present. We need to test this case.

The BNO055 operation without any probes is another issue and is trickier than it should be.

[jonnew]

With respect to the abstract error message, this is almost certainly the reason:

bonsai-onix1/OpenEphys.Onix1/NeuropixelsV2eData.cs

Line 65 in faf6ea1

var gainCorrection = ProbeIndex switch

This is a bug. If the user selects for the the NeuropixelsV2eData operator that is not present, then this should result in an error but not due to the unhandled exception of attempted to cast null to double.