When I click the "preview" button to preview a post I'm working on, I get this error:

Can't call method "entry_based" on an undefined value at lib/MT/Template/ContextHandlers.pm line 4547.

I don't know if this is a bug, or something I've simply screwed up.

I am using Movable Type 4.01, this worked in Movable Type 4.0, and as far as I know, I haven't done anything different with any templates or settings since I upgraded.

Any ideas?

Are you using the MTArchiveTitle tag in an Individual Entry Archive template? Try replacing any instances of it in that template with MTEntryTitle instead.

Yes, that was the problem... thank you. Thank you thank you thank you thank you. I've been driving myself completely insane trying to figure this out.

I had the same problem as well, so I'll just jump on the pile of thank you's with soliloqueer...


THANK YOU THANK YOU THANK YOU

Can you please clarify this? We just upgraded from MT 4.0 to 4.13 and now I'm having the same "can't call method 'entry_based'..." problem.

I've gone through each of the templates under Design > Templates and made the change from "MTArchiveTitle" to "MTEntryTitle", saved & published each template and am still getting the error.