I assembled a RS-232 Severino as it is in the manual, seems to be missing something in the Arduino environment, I am using the 0018, I can not find the plate, trying to load the [color=#0000ff]Blink[/color] example gives me an error, and even if the board is not connected, this is the error:
Binary sketch size: 710 bytes (of a 7168 byte maximum)
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
trying to load the Blink example gives me an error, and even if the board is not connected, this is the error:
Not having the board connected to the PC will cause that error all the time. The error just means that the IDE cannot 'talk' to the board. Same error if you don't have the proper comm number selected in the Arduino IDE. And as stated same error if you don't have a bootloader on the board. It's a general communications error and can have many different causes.