[GRASS5] [bug #2854] (grass) r.terraflow GUI bug

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this bug's URL: http://intevation.de/rt/webrt?serial_num=2854
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Subject: r.terraflow GUI bug

Platform: GNU/Linux/i386
grass obtained from: Mirror of Trento site
grass binary for platform: Compiled from Sources
GRASS Version: grass57_exp_2004_11_13

when r.terraflow is picked from the GUI it prints to the terminal a following error:

GRASS 5.7.cvs:~ > r.terraflow December 2003
region size is 331 x 671

ERROR: Required parameter <elev> not set:
    (Input elevation grid).

ERROR: Required parameter <filled> not set:
    (Output (filled) elevation grid).

ERROR: Required parameter <direction> not set:
    (Output direction grid).

ERROR: Required parameter <swatershed> not set:
    (Output sinkwatershed grid).

ERROR: Required parameter <accumulation> not set:
    (Output accumulation grid).

ERROR: Required parameter <tci> not set:
    (Output tci grid). 

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