Yeah, you are not alone. Happened to me too.
Did you do your ramp test on the day TR programmed it for you?
I find much better to do it when you feel like it, and mentally you are in a good state.
After a couple of days of Petit, and Whorl, you might want to spice up your easy week.
I use a HR monitor because I know I can usually reach approx 6 beats/min below my max before I have to stop. If it is very much lower as in my march ramp test and i have to quit , I know i will get a FTP too low ,which will affect my training on TR.
So do not dwell on not completing it. Just reschedule it .
If you have changed your trainer ,do not compare your result to your old trainer.
I know HR is unreliable as a measure in interval training, but it is useful as a guide, combined with RPE.
With experience, you will know when the workouts are set at the right intensity for you.
You say you rarely bail out, so you probably have it about right.
Good luck with your next ramp, keep us posted how it goes.
It is so weird when people bail in the 18th minute or later! (By ābailā I mean that they stop despite being able to go on).
I mean, there is enough pain involved in getting to the 18th minute to make you think twice before deciding youāll be doing it again? Iām not trying to be critical, itās just that if I were to bail, it would be either before the test (done that) or quite early.
Thanks for the support guys! Itās good to see Iām not alone. I might retest in a week or so after a couple days off. Iāll likely use the feedback that someone mentioned of not doing the test in the morning.
I usually train in the morning and itās fine, I just think I need more time to warm up in the morning than usual, which is not conductive to a great ramp test.
I canāt speak for anyone else but Iām not this lucid in the 18th or 19th minute.
Fair point. Maybe itās just instinct.
I think most of my true bails (say before 18) are days where I know Iām cooked coming in and I probably shouldnāt assess in the first place. I probably need to get better about judging that beforehandā¦ I tested Monday and bailed at 17:45 then struggled with a single SS interval after. I thought about it, and determined that I hadnāt honored my recovery very well, so I took three days off the bike entirelyā¦ rode easy Friday and assessed again yesterday and got to 19:37 and then did 3x10 SSā¦ I was just cooked Monday and had no business testing.
You know what, sometimes this works, and sometimes it really doesnāt. Iāve had good and bad assessments on days I thought I was cooked. Iām starting to think itās always worth the attempt, because sometimes you find grit or determination or raw power you didnāt know was there, and thatās hugely motivating. If you find nothing and it goes terribly, well, you knew you were cooked to begin with, so nothing lost. 
I have had a stressful week and just bailed on my ramp test. It started ok and then came to hard stop fast. My ānewā FTP is 197 from 211. I think I will keep the 211 and see how I get on.
The last time my FTP went down, it was about 3 watts and the test after that I set a new PB to 211. I doubt I have lost 14 watts since my last test. Well, I hope