[GRASS-dev] what is the meaning of: "Error reading raster data for row 239 of <MASK>"

[Moritz Lennert]

Hello,

When I run a script that loops over a long series of point data sets and 
then does a series of raster calculations based on these data sets, I 
sometimes get the following error:

ERROR: Error reading raster data for row 239 of <MASK>

Can someone explain what this means and how to debug this ?

Moritz