Would be interesting to know which maps works. But I rather don't expect Achim to flash back buggy firmware, which is ok for me. The most important is that free maps work again. Thanks for investigating the problem.
-- Best regards, Andrzej
Meanwhile Achim flashed 4.00 on his Echomap again and tried all the test maps. None of the test maps worked: - the map made with cGPSmapper - Steve´s test map - the map I made with the mkgmap-r3316 distribution using my style and options - the map I made with the mkgmap-r3316 distribution using default style and options (only marine patch applied) Yes, it would have been interesting to know why this old map (made using r3316 in 2014) worked but all the others don´t. But I stop investigating here as the problem can be solved by updating the device from 3.40 to 4.20 directly. Regards, Jürgen