Thread

Hi,

I just encountered this problem when publishing an entry or updating. It only seems to happen on certain channels:

A PHP Error was encountered
Severity: Notice
Message: Undefined offset: 0
Filename: structure/tab.structure.php
Line Number: 317

A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /../system/codeigniter/system/core/Exceptions.php:170)
Filename: libraries/Functions.php
Line Number: 806

A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /../system/codeigniter/system/core/Exceptions.php:170)
Filename: libraries/Functions.php
Line Number: 402

Are you running the most updated version of Structure?

Hey Austin Siewert,

Thank you for posting your question here on the ExpressionEngine forums.

Same question from me. Have you updated your Add-Ons and did you update ExpressionEngine recently?

Cheers,

Hi Everyone,

Stumbled across this thread looking for a solution, then found the solution and returned to report back.

Here it is from the horse’s mouth:

https://structure.tenderapp.com/discussions/problems/1810-error-when-setting-listing-channel

Basically, this happens when a channel is assigned the role of “listings” and is being published to without those listings being assigned to a page parent. So, you have to have a page already in structure to serve as the parent/splash, go into the structure tab on that page, and select the “listings channel” you’re publishing to right now, getting the error, and the error will go away.

I hope this helps! It stumped me too. Wouldn’t it be easier to have a warning instead of php erros. ha!