Mine did that but I refreshed the page but on completion when it was rebuiling I get..
Was from vb4 thou.
An exception occurred: [Exception] DateTime::__construct(): Failed to parse time string (2014-04-06 at position 11 ): Unexpected character in src/XF/Criteria/Page.php on line 44
I'm having trouble as well - but with a vB4 conversion. Every time, I don't get even 1 full percent into the posts table before it crashes... I wonder if it's a similar issue...