[Qgis-user] Vector data. Split features.

[Ourizo Cacho]

Hello,

I´m new with QGIS and I have a problem I can´t solve, I´ve read the QGIS 
User Guide, when referring to working with vector data, but I couldn´t 
find the answer...

I´ve created a new vector layer and digitalized a single polygon. Then I 
made a Fill ring operation, obtaining two adjadents polygons.

The question is that now I want to made a Split Features operation and I 
define the new polygon with normality but when executing the order, an 
error message turns up, like this:

"The geometry is invalid. Pkease repair before trying to split."

If I open a new blank project and create two simple rectangles, when I 
try to split, I get it right.

I'm quite muddled up. Does anyone know what I´m doing wrong?. And how to 
solve it??.

I´m running QGIS on W8.

Thank you everyone beforehand.

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