Install Error: Call to undefined function: add_filter()

How did you set the permissions? Did you use your ftp client? I would suggest you try using your hosts file manager and attempt to set the permissions that way.

Sometimes, the best thing to do is just start from scratch and see how that goes. Try setting permissions thru your hosts file manager and see if that gets you anywhere first.

add_filter() is a function in wp-includes/functions.php. Do you have this file, is it *not* zero bytes in size, etc.?

Wow – good job, to both of you. Splanters, I had actually already used the host ftp manager to update the permissions – but I had only known to try it because my host support-person suggested it – but that didn’t fix it. But Kafkaesqui, you suggested to look at whether the file is 0 bytes. It was not 0, but guess what – it was half the size on my host as it was on my local drive – God only knows why! I did a search for the “add_filter” function and it wasn’t in the file! So there was definitely a screw-up in my upload… So back to Splanters idea to start from scratch – I deleted the host directory, started over, and the install worked! By the way, I did not touch the permissions on the 2nd go-round, so in my case it was not necessary. But thanks to BOTH of you. What a strange error – I’ve used CuteFTP for years and never run into a bad upload – Again, THANK YOU!
Rex