Thorsten Froehlich wrote:
> 
> [...]
> 
> It really thinks this is the max_gradient.  I don't know exactly why, but it
> max_gradient works this way...

Anyway it should be changed, otherwise you have no chance avoiding the
warnings.

I don't know the code, but i presume when 'open' is used some necessary
calculation is missing and therefore a wrong max_gradient is calculated in
the end.

Christoph

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