Will send snapshot in 45 mins.
It is pretty simple. My local file procedure where i write or read or check for presence, must start with File1.LegacyMode True in order for File1 to work. It was recommended by you or Anke a few months back with the warning that it was going to stop working in a few month.
I guess a few months was yesterday. On err i check my blocks and LegacyMode block was floating by itself. It was not connected to a File1 control, so AI2 doesnt recognize it any more.
I deleted LegacyMode block and error warning disappeared but rest of File1 blocks failed, can't read/write or check for presence.