discuss.answer
With that many pages, you may be running into the PHP default timeout at 30 seconds. If you ask your host, they might bump up the time limit for you.
Hi, thanks for the response. It seems like it indeed, however, it's a bit strange because we did this multiple times without problems.
Processes can take longer when the server is busy. Also, the site may be a little bigger now and you may have been close to the limit before.