I have a Seaside application which includes a file upload feature. renderContentOn: html ⦠html fileUpload callback: [ :file | self receiveFile: file ]. html submitButton: 'Uploadâ ] ⦠In receiveFile: I just save the uploaded file on the file system. When I upload a file larger than 16 MB an error page is shown with the error message: Bad Request ZnEntityTooLarge I found that by using ZnConstants>>maximumEntitySize: I can increase this limit. However, I want to catch this in the image and show an error message to the user. I tried wrapping receiveFile: and renderContentOn: with an on:do: exception handler for ZnEntityTooLarge. However, neither works. It seems that the error happens before renderContentOn: is even called. I searched the mailing lists but did not come up with an answer. How can I achieve this in Seaside? Any help would be much appreciated. Cheers, Bernhard