Do you have a sample of your custom geo data?
Here is what is now in the table, I have added Country recently but it was not needed in Tableau 7. I then get an error that reads "Ignored 6156 invalid rows in the file Customgeo.csv." which is all the records.
Postcode Latitude Longitude Easting Northing GridRef District Ward Country CR4 1TL 51.41279 -0.14649 528998 169826 TQ289698 Lambeth London Boro Streatham South Ward United Kingdom
I'm also having issues with an import and similar data. Same error. Any answer or solution to this would be great.
Could it have something to do with different types of hierarchies? The default setup does not contain the fields listed above. Plus from what I can tell, the order of the columns might be vital.
I found useful information here:
Basically anywhere down from here: http://onlinehelp.tableausoftware.com/current/pro/online/en-us/help.htm#custom_geocoding.html
Does that help? Or could you specify your data structure further?