roughness lines causing issue in calculations (2007-12-06)

[Old Forum Archivist]

Hi,



I'm running Wasp 8.1. I have put in a dummy roughness line on top of a map containing height contours (imported via .dxf file) but when I try to calculate a resource grid, I get an error saying:

Could not do the calculation because ...

failed to calculate the resource grid results because ...

could not perform a resource grid calculation because ...

could not perform a resource grid calculation because ...

a problem arose while calculating the grid site with co-ordinates (3633000,3358400) because ...

could not accept new sector frequency for a Weibull wind because ...

failed to handle the toolbar click because ...

failed to calculate the resource grid results because ...

could not perform a resource grid calculation because ...

could not perform a resource grid calculation because ...

a problem arose while calculating the grid site with co-ordinates (3633000,3358400) because ...

could not accept new sector frequency for a Weibull wind because ...

the system reported that:

'Local exception: The frequency must range from 0 to 1.'



If the roughness line is in a circle or runs from east to west it works fine, but if I put the line from north to south (along a coastline) it throws up this error. Can anyone help?



Thanks,

Lucy

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