<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:10pt"><div><span><br></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 10pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div class="y_msg_container"> <hr size="1"><font face="Arial" size="2"><b><span style="font-weight:bold;"></span></b></font>I had some problems with similar error message,they occurred when I wanted to restart osmocom-apps after having removed phone with its usb cable<br>from pc and then reinserting phone and usb-cable. But when I just remove the phone from the usb-cable and then reconnect phone to the cable the "Cannot open serial device /dev/ttyUSB0" messages no longer occur and one can then rerun the osmocom-apps without error messages.<br><br>Regards<br>Erich<br></div> </div> </div> </div></body></html>