Hi
I've added a .net usercontrol as a macro to an existing umbraco ( v 4.0.2.1 ) website. When an error occurs in the code rather than displaying the actual error it displays this one:
Multiple controls with the same ID 'ctl00$ctl00$ctl00$ContentPlaceHolderDefault$ctl14' were found. Trace requires that controls have unique IDs.
I can't find that control in the html and I'm not quite sure where to begin finding it as the site was built by someone else. Is this something that has an obvious cause, if not where do I start trying to debug it?
This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/5511-multiple-controls-with-the-same-id-were-found-trace-requires-that-controls-have-unique-ids