year you're right I kept it running a couple of years and it seems to have worked. thank you very much mate.
I set the values as follows: (by the way, in which way does actually the Town Density value affect the game?)
-- Town parameters
modConfig.townArea = 20 -- Town density
modConfig.townInitSize = 1.0 -- Initial town size
modConfig.townGrowthSpeed = 1.5 -- Town growth speed
modConfig.townGrowthExponent = 0.9 -- Towne growth exponent (factor)
modConfig.majorStreetAngle = 10.0 -- Angle within town major street directions are randomized (in degrees)
modConfig.maxTownSize = 0 -- 0 (unlimited) or a number >= 500 (limits all land use counts)