Arno,
No need to be rude. I was answering your question.
Cheers.
In post # 1 you say you cannot install the 815 maps.
In post # 4 you say your Navcore is 8.002 and you are going back to 800 maps.
In post # 8 you say do not have 8.3 but are still trying to install the 815 map.
In post # 10 you say you understand and hope for changes this year.
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In post # 3
GarCor explains that he has the problem with 8.3 & 815 maps and that he was thinking of going back to 8.010 & *.xx ,maps.
In post # 7
I say "I trust you had NavCore 8.300 on your 930 before you downloaded the 815.2019 NA map."
In post # 9
dhn tells you the the 815 maps will not be functional without 8.3.
In post # 11
I suggest for you to download 8.3 to try it if you had the older one as a backup.
In post # 12
dhn says that 8.3 is neede to run 815 maps.
In posr # 13
I point out that you must have 8.3 to run 815 maps.
In post # 16
I suggeted you follow dhn's advice to revert to an older system if you did not like 8.3 .
In post # 17
infama said "815 map could never be shipped with anything but NC 8.30."
In post # 20
I am telling you that everyone said 815
must be used with 8.3.
You have a rather unusual idea of what being rude is.
If you have a language problem, say so or, at least, ask for clarification if you do not fully understand a suggestion or instruction.
I have been trying patiently to explain things but am getting the feeling now that I have been wasting my time.