WordPress MU

Yes I have the dreaded blank screen of death. I've looked through the forum for this and while I found some posts about it, they're not quite answering the problem.

I upgraded my site from the stand alone WP to MU last week. Everything was going perfect for the last week. I was posting, adding media etc and when I went to change to another section of the admin i got a blank screen. So far I only have the main blog and 1 sub-directory blog. Loads of posts in the que for the sub with loads of content.

I ran into the default size limit for uploading a few days ago so I increased the limits. Still everything was fine until this evening. The only thing I did differently was add two link exchanges with a colleague of mine. But then I went back to uploading and posting.

I do have an email into my host in hopes that they can see something I can't.

Any ideas would be most appreciated.

Do you have access to your Apache/PHP error logs?

They should tell you the exact cause of the fatal error.

Some users in 2.8.1 received a white screen due to WPMU maxing out PHP's eror limit. See this bug.

The above bug was fixed in WPMU 2.8.2, so I suggest updating to 2.8.2

You will obviously have to update manually (via FTP) though.

A white screen will show up in case of *any* fatal error. That's why you need to find your error logs and see what they say.

@ Andrea, I did check the error log and this error shows up multiple times (I'm assuming each instance is a call to load the site)

PHP Fatal error: Call to undefined function wp() in /home/sites/******/pornglamourgirls.com/htdocs/wp-blog-header.php on line 21

@ jamescollins - I did try to upgrade but for some reason I keep getting the following error message when trying to upload the files:

451 Failure writing to local file

stumped...

You've lost a file, or the permissions are wrong on it.

If you are getting a 451 when trying to do a manual upload you really need to talk to your hosting company and get the permissions sorted out.

You've lost a file, or the permissions are wrong on it.

If you are getting a 451 when trying to do a manual upload you really need to talk to your hosting company and get the permissions sorted out.

Thanks, I'm waiting for their return email to see what they say. I can't imagine how I could lose a file or change permissions in the middle of moving around the admin section. That has me really confused.

Maybe I reached some kind of limit on my hosting plan. But if that's the case I'm also stumped as I haven't even come close to the bandwidth and/or storage limits.

A lot of shared hosts limit CPU/memory usage, which can be far less than bw & storage limits.

(although given the nature of your site, you're probably on a more flexible place :D )

@ Andrea - You're right, my host is pretty flexible with me and all my sites. Been on ICQ with them this morning working side by side. They didn't see anything 'wrong' from their side. I did have a problem using my ftp, fetch, for some reason. Kept getting error messages basically saying it could not write to the server. But I was able to use my hosts admin section ftp for a few files to get things going.

@ jamescollins - The upgrade seemed to do the trick. But I also noticed my wp-config file was empty. I have no idea how that happened. So before running the upgrade I deleted the config file that was in there and let the install make a new one.

So far everything is working again. My fingers are crossed that it stays that way. I'm saving a copy of my config file at least until I can figure out WHY the previous one was wiped clean to begin with.

Thank you very much guys

I'm saving a copy of my config file at least until I can figure out WHY the previous one was wiped clean to begin with.

Excellent idea. A config file being wiped clean is Not Good.