3.0 TDI DPF – Emergency Run

Hello! I have been having problems with the engine for a long time. (3.0 TDI BMK, EZ 2005, about 195 000 km) The car was the last 10 000 km often in the emergency run (55 km/h, no more power) and the DPF warning light came. The first time an emergency regeneration was carried out at Audi, today I did it myself with VCDS for the second time. In the error memory I find no plausible errors? Is it normal that he has not regenerated himself since about 1400 km? At the fault memory as well as data for emergency regeneration. Thanks in advance.