New version of GUI not recognizing the old Acquisition board

[HiroyukiKato7]

We have been using Open-Ephys 4.5 plugin GUI without any issues. However, when we updated the GUI to the latest version, it failed to recognize our Open-Ephys Acquisition board. We rolled back the GUI to the old 4.5 version, and it works without a problem.
Is there a compatibility issue between the new GUI versions and the old acquisition boards? My board was purchased back in September 2018. We run the GUI on Windows 10.

[jsiegle]

Just to check – are you using the Acquisition Board plugin from the "Rhythm Plugins," and not the "OE FPGA Acquisition Board" plugin?

[HiroyukiKato7]

Yes, we have been using Rhythm FPGA Plugin. Do we need to switch for the new GUI?

[jsiegle]

In the latest version, the required plugin can be accessed by first installing the "Rhythm Plugins" via the Plugin Installer (ctrl-P), or selecting the default configuration (ctrl-D) for the Acq. Board. The plugin is now called "Acquisition Board" rather than "Rhythm FPGA." If you've already done those things, let us know.

[HiroyukiKato7]

Thanks! Now it recognizes the board. However, I have a problem setting up the new GUI.
I have 2*64 channel probes connected to the board. When I chose to save 128 channels plus two ADC, as you see in the attached screenshot, somehow the GUI saves ADC1-3 and ch2-128. So, it saves ADC3 instead of ch1. Do you have any idea why this happens? It may be related to issue #438, but I am not sure.

[jsiegle]

Can you double-check the ordering of the channel map? For example, it looks like channel 129 (ADC1) is mapped to channel 96. I think you only want to be reordering channels 1-128, and leaving the ADCs (129-136) in the original order.

[HiroyukiKato7]

Oh, you are right. It's weird, but it seems that all the values in the channel map shifts by 1 when I load the map that we used to use for GUI ver 4.5. Has there been a change regarding something like 0-indexing?

[jsiegle]

The channel map JSON files have been simplified, but I believe the indexing conventions should be the same as before. The latest format is documented here: https://open-ephys.github.io/gui-docs/User-Manual/Plugins/Channel-Map.html#saving-and-loading-channel-mappings

[HiroyukiKato7]

It seems that our older map starts at 1, instead of 0 in the current version.
Anyway, this solved my problems. Thanks for your prompt answers!