Hi, Salvatore.
You can also try the special module r.quant (http://grass.gis-lab.info/grass64/manuals/html64_user/r.quant.html).
I’m trying to round a floating map. I revived an error: Overflow occured in the calculation. Why?
I used the command r.mapcalc “R_round=round(R_seJ_ha_filled)”
My goal is to obtain an integer map. Is there another way?