Yes. Looking for reasons of this error

https://s3.amazonaws.com/iridium2_downloads/Android+App/i2+Control+2.2.1.apk
Try to install the previous version of i2 Control V2.2 on your device and upload the project. If it will not help, we have to connect to your PC via TeamViewer to check everything.

Ok, please check the free memory on the tablet it should be more then 100Mb free.
Please show me the log from Transfer.

Ok, press F4 on project start show me the log that you'll get

Hi Gary

Please check your license file: u have to use Trial license or Device License for AV & Custom Systems (Pro)

Hi
Please update the Android version to 5.0.2 and check that the WiFi connection is stable:
restart your WiFi router, check the connection quality using special utils like "Fing".

Theo, not everybody. This method is not safe for us in case of commercial usage by our opinion, so we don't plan to update the current licensing system. It will be realized with server OR with new "cloud" licensing.

Hello Matthijs
It is not a problem of iRIdium, it's a limit of KNX interfaces, how should we solve an external problem? When iRidium Server will be released, you'll solve this problem using Server, but now it is not possible. We can return to discuss after releasing of Server.

How it should look to be useful for you? Our guys says it is possible to use websockets, but maybe the current state is not convenient for you?