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It just returns ERROR: Unable to create signature file. It doesn't say why... Anyone had this before and found a solution?

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A few more details would be needed. For example, the output of g.region -p – markusN Jul 24 '11 at 15:52

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I had the same problem and solved it by giving the group name without the @permanent part.

Take a look at the /yourlocation/permanent/group folder. You may find there a "yourgroup" folder and a folder "yourgroup@permanent". So take care when you give parameters to i.gensigset so that when you give the name of group you omit the @permanent.

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Please submit this as a bug to grass.osgeo.org/bugtracking – markusN Jul 27 '11 at 21:32

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