Filled Windows

Hi all,

I'm just going to do my first steps on 3D printing and got a problem with a drawing I made in Sktechup. When I export my drawing into the stl-format everything seems to be fine, netfabb shows everything correkt:



After uploading my file to shapeways, some of the windows are filled:



I can't find the problem - is anyone able to give me a hint?

Thanks and best regards from Germany,
Christian

Your part needs to be repaired. Netfabb shows the red /!\ sign. You have to repair your STL by clicking on repair (little red + button in the toolbar), then "automatic repair", then "apply repair".

OK, I thougt the red /!\ was shown because I used an unregistered Version of netfabb, it was the first time I worked with this program.

Thank you, I hope I'm now able to repair the drawing independently.

Christian