Ok. Test Results plus some more issues.
I have recorded movie from this short flight I hope it will help you to understand what is going on. I showed there what is happening with pf3_freqs.dat file in fsx dir folder, ENTN and ENRK radio freq config in PF3 options.
1. 01:00 as you can see PF3 produces freq for dept airport but ctrl and dest are empty. I have noticed that when I delate pf3_freqs.dat file to force to create new one, PF3 very often produces empty file. Finaly after some flights in completly random situation it will load all freq's.
a) even after connecting PF3 to FSX freq's are still missing for ctrl. and dest. Anyway I was supprised that it cought dept. freq. mainly it happend that after delate pf3_freqs.dat file, freq table is empty at all and after some flights it will find feq's for all dept. ctrl. and dest.
b) The mission briefing is empty in fsx but sometimes freq are sown there correctly.
2. 04:00 Request ctrl freq. from FSS. He said contact ...0.0MHz
3. 05:30 PF3 can not find suitable runway for ENTN, but entry exist both in PF3_FS9_Runways.dat (PF3 data folder) and runways.csv (FSX main folder). I would like to add that sometimes it works without problems - it is like random.
4. 10:00 "
ENRK??? ... departing the area...". It hapends when PF3 will not find suitable runway for ENTN dept. airfield.
5. 10:40 FSS can give correct ceter freq when asked.
6. 18:10 Controller asked me to report airfield in sight, then he should inform me that I can switch to local freq. 122.90 (freq. for ENRK is added/saved again just in case and check. 00:25) Unfortunately command "8" report airfield in sight does not work. PF3 has choosen "amend to alternate" instead of "report airfield in sight".
I have forgotten to report on finalt
Rest was ok.
Movie link below
https://youtu.be/LrevU0drdak