Baffling new (out of the blue) problem recording Addictive Drums

Edit: Problem resolved I set up a track for Addictive drums as a plug in, like I have done successfully several times, and hit record. No midi information recorded. I made some adjustments, made sure it was armed, and hit record. Again, no midi, just an empty track. I then went into an older project with an existing Addictive Drum track, which theoretically has all settings correct since I was able to record drums at that time. I went to the end of the track, hit play on AD, and then hit record. No midi data. I can see the track's meter dancing to the rhythm coming from AD, but still no data being recorded. That would be strange enough, but when I double click on the empty midi waveform I just recorded, I can manually add drum hits, and when I play this, it plays. Any wild idea what might be going on?

are you trying to record MIDI input (like played in from a keyboard or drum pads) or MIDI output ( eg, rhythms which have been created in the drum machine)?

I assume the latter. I hit play in the Addictive Drum plug in, and it plays, and the track's meters dance, but no data gets tracked. I can also activate individual drums on the plug in with my mouse, but this does not get recorded either.

you need to decide which you want and set the recording mode accordingly. it sounds like you want to right click the record symbol for the track and select "record Output (MIDI)"

I'll try it.

I right clicked on Recording arm, selected Record: Output (MIDI), but it still won't record. The meters still activate during the attempt, but no data is recorded.

I made two changes to the computer from the last time Addictive Drums worked until now. One was update from Reaper 6.38 to 6.42, and I bought Toontracks EZDrummer. I had much difficulty getting Reaper to see the new plug in, even with help from Toontrack support. I eventually abandoned their scanning procedure and simply moved the .dll to the Reaper FX folder. This worked. I have since removed the Toontracks .dll from the FX folder, and updated to Reaper 6.43, but no change in the problem. Edit: From the last known time AD worked, I also bought four plugins from Waves, and installed them without any issue.

i'm out of ideas then. I don't know AD, perhaps there's a setting in it for MIDI output, that got switched or something

I really appreciate your attempts.

Maybe check you have not changed the midi channel your keyboard is transmitting (on your keyboards settings, not in Reaper). In Reaper, if you have midi record mode set to keep original channel (rather than forcing a particular channel) and a vst instrument inserted that does not receive that channel, the behaviour you describe can result. With many vst instruments that default to receive omni, you will not notice the channel has changed as it will not make a difference. It had me stumped once with a Kontakt instrument when I had inadvertently done the same.