Problem: guiDesigner wont upload to device running iViewer.

1. Check your upload port. If you've used a different port other than the default port previously, you'll need to change it. Every time you install a new guiD the upload port will revert back to the default 8019.
2. Check your firewall - it could be blocking any incoming connections after the install. Try disabling the firewall and see if this fixes the issue.
3. If you have Multitasking switched on on iViewer settings, you will need to kill the app before it will reload the gui. Try switching multitasking off.

If these solutions do not solve the problem, submit a ticket or navigate to the Google Groups via our Support Page.