[GRASS-user] i.pca gives error

[Martin van Brakel]

Hi list,

i am processing plenty of modis subsets into a group called "pca"

when using WinGRASS it gives an error

GRASS 7.0.svn> i.pca --overwrite input=pca output_prefix=_msub
Computing covariance matrix...
 100%
ERROR: No non-null values
GRASS 7.0.svn>


can anybody help please?

Martin
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