Data truncated after 255 bytes while using Microsoft.Ace.Oledb.12.0 provider

Question

I am reading an excel sheet using the ACE provider and certain cells contain data greater than 255 bytes. I tried changing the TypeGuessRows in the registry settings as well as

Answer 1

I am also using Microsoft.ACE.OLEDB.12.0 on 64-bit Windows 7.

I found that the TypeGuessRows in the connection string has no effect.

But increasing the TypeGuessRows in the following registry location works:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\12.0\Access Connectivity Engine\Engines\Excel

More info on a similar bug (although you may already know this as you're already trying to change TypeGuessRows)