DPF REGEN LIGHT

[Rocky33]

Hi everyone, i had dpf warning came on last night ,''DPF Full continue driving'',I must admit these must be due to short journeys i recently had due to relocation to a country side and thus lower speed limits on the roads,It has been 1 year since i saw that message last time and since then took precautionary measures like installing led light ,using additive on a regular basis,changing oil 6 to 8 months and using only GM original dexos 2 oil.
I also tried not to fail any regens, sometimes had to take the car back out again from driveway for it to complete regeneration
after all this and being careful with the dpf system, yesterday the light came on and i was surprised to see as i thought i was completing all regens . etc. Could this mean regens are not effective on lower gears due to speed limits on country side roads(irish roads) or the life of the dpf is coming to an end,its 2014 1.7cdti with 77000 miles on it.I tried blasting it on a 100 km/hr road(in Ireland) but every time i reach there regeneration finishes so basically i am using 2nd and 3rd gear mostly and 2500 to 3000 rpm,regeneration time is same as before so i think there is no indication its failing.
If it happens again then i might be thinking to change the car , its a shame because i like this car very much .