Thanks for the incredibly quick reply John. I am using a Samsung Active Tab 2, with the additional 128GB SD card. The issue happens if i save all maps to the card and then run the Ap, it just crashes. I have carried out at least 2 uninstall/reinstalls of the Ap, If I switch off the ‘save maps to sd card’ and then load them to the Tab memory the issue goes away, but i dont have sufficient memory to load what I need ! Sarge

What Android version is it running?
Is the SD Card formatted as “Removable Media” or as “Internal Storage” ?

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