I have a Symbol TC700H.

Run the DataWedge Demo app works fine.
Press the oblong circle on the lower right, brings up task list.
DWDemo app appears, swipe right.

Restart app.

App will not activate barcode scanner.
Same problem occurs in my app that I wrote using the EMDK package.

Problem does not occur on other TC70 based scanners.such as Motorola TC70.

I have to Power Cycle the scanner to get it to work again.