The problem is that you have placed a symbol for the lt1394cs8pbf which has no spice subcircuit model associated with it. There is a subckt available for this device from Linear Technology but unfortunately it is written using some of the specialised LTspice features and models that are not supported by ngspice as used by EasyEDA. As such it would be a major task to translate the LT model into ngspice. **However, all is not lost by any means!** If you need to simulate this device then I recommend that you: 1) install a free copy of LTspice (which runs natively on OS X and Windows and seamlessly using WINE on Linux): http://www.linear.com/designtools/software/#LTspice 2) Then when you have completed your simulation and design work in LTspice you can simply import the .asc schematic file directly into EasyEDA where you can easily fill out the Bill of Materials and to then pass the schematic design through to PCB layout: https://easyeda.com/Doc/Tutorial/import.htm#Import