Attributesmap mask overlay fails

Hello,
I recently found good use of the mask overlay to recalculate specific areas of my terrain with "myClimate - auto-calc"
unfortunately out of the blue the mask overlay stopped working most of the time couple of days ago and I have not been able to produce tangible reason why it does not work.
it spams this into log:
calc_AM_GenPixel2 error:
- cannot get WSpxl
CMapWrap::LinInterp error:
- map not initialised.
I have made multiple test terrains and sometimes some mask images work on some of them and sometimes not.
I have tested with multiple climates, with and without my custom climate being loaded up.
running:
Version: 17.11 Pro x64 dev build 1
Build date: 30-Nov-2017
and have tested on previous versions too and on another computer.
I recently found good use of the mask overlay to recalculate specific areas of my terrain with "myClimate - auto-calc"
unfortunately out of the blue the mask overlay stopped working most of the time couple of days ago and I have not been able to produce tangible reason why it does not work.
it spams this into log:
calc_AM_GenPixel2 error:
- cannot get WSpxl
CMapWrap::LinInterp error:
- map not initialised.
I have made multiple test terrains and sometimes some mask images work on some of them and sometimes not.
I have tested with multiple climates, with and without my custom climate being loaded up.
running:
Version: 17.11 Pro x64 dev build 1
Build date: 30-Nov-2017
and have tested on previous versions too and on another computer.