d.mon:"can not allocate any read/write color cells"

[Markus Neteler]

> The real problem is that I get the following error when runing d.mon, and 
> this
> seems more serious:
> 
> [root at localhost bin]# d.mon start=x0 &
> [1] 22540
> [root at localhost bin]# can not allocate any read/write color cells
> 
> and the monitor window never comes up.

The solution might be found here in GRASS FAQ:
  http://www.geog.uni-hannover.de/grass/admin/allocate_colorcell.html

Good luck

  Markus