[Qgis-user] Problems processing Raster calculator

[Gustavo Iglesias]

Dear QGis users:

I´ve just run the Raster calculator to estimate NDVI result using Sentinel2
images. I´ve got the bands 8 and 4 to do the calculation as: NDVI =
(B8-B4)/(B8+B4).

Every time I run the calc appear this Message (in spanish):
"Calculadora ráster: No se pudo crear el archivo de destino" . In
english = Raster
calculator: Could not create target file.
The name of the file to be created was: NDVI Sentinel 26032021.

Thanks in advance for your help

Gustavo
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