[GRASS-user] Pan-sharpening problem

[Reno Bladergroen]

Since my last post I learned a lot in the few past days, but keep stumbling
on problems :-/. According to an excellent site 
http://www.oryx.com/ams/landsat.html (tip from hamish_b... thanks!) i
followed their instructions almost exactly and tried to pan-sharpen an area.
I called my imported output files simply "Tm-2/4/5 and pan-80". Now when I
start the i.fusion.brovey command the following error pops up: Calculating
brov.red: ...(step 1/4)
Invalid map <Tm>
Parse error

An error occurred while running r.mapcalc

Then I thought: lets try to run r.mapcalc on the first three band files with
the formula A+B+C. That worked fine!
What am I doing wrong? All files are in the same area (and accepted that way
by grass) and also imported in the same location.

Hope to get some ideas on this. Thanks in advance,

Reno
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