Can you check if you are low on disk space and create some space if your are.
Also, clean out your temp dir. On any result sets over 2500 rows we serialize to the temp dir. if we run out of space or have some conversion error we might have silent issues.
One more thing, go to Help|about and access your App Data Dir. Empty the contents of the KnownExceptions.xml so it look like this.
<?xml version="1.0" encoding="UTF-8" standalone="true"?>
<Exceptions>
</Exceptions>