Your assumption that the problem could be due to the large amount of images that the image manager tries to load is correct. The image
manager of RadEditor for ASP.NET (including version 7.0.1) is not able to
load quickly a large amount of images
due to its
interface, as it reads all files in the selected folder at once. This problem was resolved in the new and much enhanced RadEditor for ASP.NET AJAX, the image manager of which offers paging.
Since you are not allowed to migrate to the new editor, the only suggestion that I can propose is to
organize the images
in folders (for
example 100 files in each folder) so that the browser can load the images
faster. This should solve the error.
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!