Having issues interfacing Active Sky Next and FMGS weather radar?
I had the same issue, until reminded by JL other programs may interfere with the weather .dat file writing.
The culprit was FSUIPC, which was configured to write weather radar data for another flight simulator program.
Look at the FSUIPC4.ini file in the Prepar3D\Modules\ directory and ensure the line “ASNwxRadarPath=” is removed or disabled.
The original weather radar tutorial has been updated.