Go to the directory where your simulator is installed, delete the airports.dat and ARPT_RWY.dat in PMDG-NAVDATA-and try reinstalling your airac version. I was getting this error in previous versions. This is how I solved it.
Go to the directory where your simulator is installed, delete the airports.dat and ARPT_RWY.dat in PMDG-NAVDATA-and try reinstalling your airac version. I was getting this error in previous versions. This is how I solved it