On Sat, 11 Aug 2018, Markus Neteler wrote:

Works nicely.
Maybe any spurious hidden char at the end of row 1 or row 2?


  I found the cause: a wrong character (-) in the source and output file
names. Those hyphens need to be underscores (_). This was difficult to find
because the error message pointed to a problem with the file contents (for
some reason) and not to an illegal filename character.

Thanks, both of you,

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