A colleague gave me a zipped Prezi presentation the other day, and when I opened it after unzipping the presentation gave me an error on startup:

The error details “id: 2000 the reason is: PreziError id: 2000 the reason is: ErrorEvent ioError Error #2035” do not give much of a clue as to what has happened.

In my case it turned out that two of the pictures used in the presentation had a different filename after zipping and unzipping. Before zipping, both pictures had spaces in their filenames. After zipping and unzipping, those spaces were replaced by ‘%20’ and Prezi could no longer find the pictures.

You can find the pictures used in a presentation in the data\repo folder of the zipped/unzipped presentation. I changed the filenames back to their original value, and the error disappeared.