[0.805][crash] failed to download data file after two turns IN game not during load but IN GAME

here is a weird problem,

loaded elemental 0.805,

played intro ,

arrived at menu

loaded previous save game,

played two turns then the dreaded message 'failed to load data file'

here is a pic of the error message in game

my understanding of the failed to load data file error is that it should happen during the initial loading of elemental NOT during the game and after loading a save game from the game menu

the save game,dbg err & dxdiags

harpo