Hi,
I would do a bug report https://trac.osgeo.org/gdal.  Have you tried fixing the 
geometry before exporting?  The problem could be in the tab file.  You could 
try to save in another format to see if the error is also reproduced.
Nicolas


> Le 19 avr. 2018 à 10:05, Richard McDonnell <[email protected]> a écrit 
> :
> 
> Afternoon all,
> I have a slight issue, there are a number of MapInfo Tab Files which we want 
> to convert to Shapefile, but they do not convert correctly.
> The issue arises with Rings/Holes in the Polygons, when you save the TAB file 
> as a shapefile, some of them are not displaying correct, they overlay the 
> hole as another polygon.
> The issue seems to be related to the direction the hole was 
> digitised/generated to. The issue can also be replicated outside of QGIS by 
> running ogr2ogr, so it seems to be a GDAL/OGR ESRI Shapefile Driver issue.
> Now in saying all that, QGIS 3 seems to be able to fix the issue by running, 
> Fix geometries  from the Processing Toolbox.
> My question is, Is there a way to fix the OGR Driver to fix the issue, or a 
> tick box under Save Vector Layer as... to run/implament the Fix geometries 
> tool as part of the save process?
> This is an issue, which pops up regularly online, with no solution to date.
> Regards & Thanks in advance.
> 
> Richard McDonnell
> 
> 
> 
> 
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