[mkgmap-dev] More problems with "include ... from default;"

I am getting further problems using include ... from default in style files. When compiling around 300 tiles, approx 2-3 fail to build, with mkgmap reporting the following error: Error in style: Error: (points:48): Unrecognised type command 'resolu' Could not open style custom Line 48 in my points file states: include "points" from default; The error is random, in that repeated attempts at building the tiles result in different tiles failing. I have also tried setting --max-jobs=1, but this doesn't fix it. If I copy the default style to the directory containing my custom style, and use the following instead: include "../default/points" ; then it all works as expected. Any ideas? Steve