Tacx Flow Smart trainer calibration issues with 700x35c tyre I'm getting into cycling properly and I have bought myself the Tacx Flow smart trainer along with an adventure/gravel bike. I chose adventure/gravel over a road bike as I can see myself wanting to ride light to medium woodland trails around places like Ladybower Reservoir.

I have set the trainer up and I have mounted my bike onto it as per the instructions/downloaded the app etc.

After connecting to my phone and clicking on the 'calibrate' function, I cycle up to the designated 30kph and stop pedalling as instructed only to be greeted with an error message.


  There was an error during calibration. Please try again.




I have attempted this numerous times, each time making adjustments such as pumping the tyres up to their max rated pressure of 6.5 bar / 95 psi, and increasing the tension between trainer and tyre, however I still receive the error message that calibration has failed.

Does anybody know of anything that may be causing an issue?

Just for clarity, my tyres are 700x35c
I have also made sure the Tacx Utility app I am using is up to date.



Note: I have been receiving the error message on both my iPad 3 (a little old, I know), but also my OnePlus 3T Android phone.

Update:
I have since read a few more questions on the internet regarding people with similar issues, and I have attempted their solutions.


I released the back brake entirely to ensure that there was no extra friction slowing the wheel on deceleration
I followed Tacx's guide to set up to the letter, stating that I should find the point where, when levered down, the flywheel should only just touch the tyre, and then tighten up by 4 rotations


All of this still yielded an error...

PS. This is my tyre on it at the moment while I wait for my trainer


UPDATE 2

I actually had a momentary breakthrough!

After tinkering with the Tacx Windows 10 software, I set up my own test workout (10 mins flat, nothing special). After wimping out after 7 mins (I need to get fit, IKR!) I remembered that somebody had the advice of warming the tyres up before calibrating. This makes sense.

So I hopped back on the bike and tried the Utility app for Android and BOOM I got a readout right at the top end of green informing me that I need to slacken it off a little. Success, right?

I then tried again after slackening the tension by 1 turn and it appears to be back to the same old error fun I was having previously... Technology, who would have it?
After listening to advice from @Carel, I warmed the tyres up for 20 minutes, a lot more than I would have envisaged, and I finally got consistent results being able to calibrate more than once.

After a bit of slackening, I managed to calibrate to the centre of the green zone. I can't wait to re-do the whole process after my training tyre arrives!

A quick thank you to @AndrewHenle and @DanielRHicks for their time and help also :-)