How do I force Craft to regenerate assets transform?

Question

I had to add an image size in the assets transforms; all my pics were previously uploaded, but when I use getUrl('headIpad'), it makes urls like this:

http://host.com/cpresources/transforms/4/

Instead of this:

http://host.com/uploads/team-photo/_headIpad/fall-back.jpg

I tried to use generateTransformsBeforePageLoad in my config but Craft generates an error:

Internal Server Error Image “fall-back.jpg” cannot be found.

Any ideas?

Answer 1

If you simply go into your craft_assettransformindex table and empty it, that should trigger brand new transformations for everything.

Answer 2

Let me add, for those like me who just moved to a different server, before you dump the table, make sure your assets directory is writable by Craft. I did what Lindsey D suggested, and it recreated the table nicely (with no errors noted) but didn't actually create the images, because I didn't have the directory writable.