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I'm new to GIS.

I have a shapefile for which I defined the coordinate system (using the Define Projection tool) to WGS_1984_UTM_Zone_32N and now I'm trying to reproject the shapefile from WGS_1984_UTM_Zone_32N to GCS_WGS_1984.

I'm using the Project tool but I always get the following error and the projection never happens.

ERROR 999999: Error executing function invalid extent for output coordinate system. The operation was attempted on an empty geometry

I run the Repair Geometry tool ,it works fine, but then when I try to reproject to GCS_WGS_1984 I still get the same error as above

I don't understand what I'm doing wrong.

I know similar questions have been asked in the past but I couldn't find one where someone gets an error.

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    You're using the 'project' tool? Which one? There's a bunch and only one will work for what you are trying to do ('Reproject'). Tools like 'Define Projection' will fail. – Thomas Nov 20 '15 at 21:49
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    What's the error number at least? You can find that information if you open the Geoprocessing, Results window. If you're getting invalid geographic/datum transformation, try redefining the input data's coordinate system with the Define Projection tool or the data's property page in ArcCatalog. – mkennedy Nov 20 '15 at 21:49
  • Can you unproject the data in ArcMap? – mkennedy Nov 20 '15 at 21:52
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    Run the Repair Geometry tool on your original shapefile. It sounds like you have NULL geometries that cannot be projected which is throwing the error. Afterwards, try and reproject to the other coordinate system. – evv_gis Nov 20 '15 at 22:10
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    Pls add to your question the boundaries of your original shape file... or check them your self. That way you can control if you have set the right coordinate system in the first place... I recommend to have a look this coordinates calculator. – wittich Nov 21 '15 at 9:31
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As commented by @wittich:

... check [the boundaries of your original shape file] your self. That way you can control if you have set the right coordinate system in the first place... I recommend to have a look [at] this coordinates calculator.

and @mkennedy:

double-check that the input data is really in UTM 32North. An error of invalid extent/empty geometry implies that the features cannot be unprojected. That could be due to the coordinate system definition being incorrect.

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