SimpleFileDownloader not working

Vaadin 6 / 7 / 8
1

Hi Experts,
I use SimpleFileDownloader for download documents(vaadin version 8.1.4). It has worked for me but not now.

I have Firefox console message:

Mon Sep 25 12:19:14 GMT+200 2017 com.vaadin.client.communication.MessageHandler
SEVERE: Error performing server to client RPC calls
java.lang.IllegalStateException: There is no information about org.vaadin.simplefiledownloader.client.SimpleFileDownloaderClientRpc.download. Did you remember to compile the right widgetset?

Please help me to solve this problem.
Thank you.
R

2

SimpleFileDownloader is an add-on, so you need to remember to compile the widgetset.

https://vaadin.com/directory/component/simplefiledownloader

3

I removed this code from UI and the download function work.

@Widgetset("com.vaadin.v7.Vaadin7WidgetSet")