I get to construct a PCB footprint of Arduino Uno Rev 3. But When I will to save the Arduino Uno Schematic. The message is error: Not exist. Can you help me. I Open a new schematic Lib and a new PCB lib. The PCB is OK.
Why the Schematic not save, please
Hi, I need more details and screenshots.
If your file disappear, you can try to find it via:
https://easyeda.com/document/recycle
https://easyeda.com/Doc/Tutorial/Introduction.htm#Crash-Recovery
https://easyeda.com/Doc/Tutorial/Introduction.htm#Version-History
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
You can recover a lost schematic.
Please see:
https://easyeda.com/forum/topic/What_to_do_if_access_to_EasyEDA_is_lost_for_some_reason_-nHgs20AaN