Transferring Tower waypoint files (dpwp) from one device to another

[David Vorreiter]

I have tried to transfer the Tower waypoint (dpwp) files from one device to another (Nexus 7 <-> Samsung S4) in both directions. Even the though both versions of Tower are exactly the same, any missions created on one device cannot be read by the same Tower app on another device. I always get the error message "Error when opening file".

I have place the mission files (dpwp) in the waypoint directory and the Tower application can see them but cannot open them.

Any clues on what is going on??