i want to make r.sim.water (hydrological modelling) in Grass Gis, and this ERROR: nwalk (7000001) > maxw (7000000)! always appears, any ideas how to solve it?

number of cells of dem is below 7000000.

closed as too localized by vinayan, whuber Mar 27 '13 at 19:52

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I am not really familiar with this function. But a quick glance at the grass manual for r.sim.water, the parameter nwalk is defined as,

Number of walkers, default is twice the no. of cells

It also says, under the heading Error Messages,

If the module fails with
ERROR: nwalk (7000001) > maxw (7000000)!
then a lower nwalk parameter value has to be selected.

so try a lower value of nwalk.

  • i tried this before i posted comment, it didn´t work :) – Lucia Mar 1 '13 at 9:46
  • How was the error message then? – markusN Mar 5 '13 at 7:18
  • it was still the same, i tried working in another pc and finally it worked – Lucia Mar 27 '13 at 15:02

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