verifyPacket Error: No Header!

[maliksyria]

Hello ,
first of all thanks for your nice software
I have robot geek snapper arm core with arduino MEGA only (without geekduino and robotgeek shield)
every thing is ok , I uploaded the snapper arm serial firmware into my arduino Mega
then I ran the processing sketch of your software when I connect to COM3 which is my Mega serial com
I got the following :

Checking for arm on startup - index# 0
Packet Sent: 0xFF 0x00 0x00 0x00 0xC8 0x00 0xC8 0x00 0x00 0x02 0x00 0x01 0x00 0x80 0x00 0x70 0x7C
Incoming Raw Packet from readFromArm():
verifyPacket Error: No Header!
Checking for arm on startup - index# 0
Packet Sent: 0xFF 0x00 0x00 0x00 0xC8 0x00 0xC8 0x00 0x00 0x02 0x00 0x01 0x00 0x80 0x00 0x70 0x7C
Incoming Raw Packet from readFromArm():
verifyPacket Error: No Header!
Checking for arm on startup - index# 0
Packet Sent: 0xFF 0x00 0x00 0x00 0xC8 0x00 0xC8 0x00 0x00 0x02 0x00 0x01 0x00 0x80 0x00 0x70 0x7C
Incoming Raw Packet from readFromArm():
verifyPacket Error: No Header!
Checking for arm on startup - index# 0
Packet Sent: 0xFF 0x00 0x00 0x00 0xC8 0x00 0xC8 0x00 0x00 0x02 0x00 0x01 0x00 0x80 0x00 0x70 0x7C
Incoming Raw Packet from readFromArm():
verifyPacket Error: No Header!
Checking for arm on startup - index# 0
Packet Sent: 0xFF 0x00 0x00 0x00 0xC8 0x00 0xC8 0x00 0x00 0x02 0x00 0x01 0x00 0x80 0x00 0x70 0x7C
Incoming Raw Packet from readFromArm():
verifyPacket Error: No Header!
Checking for arm on startup - index# 0
Packet Sent: 0xFF 0x00 0x00 0x00 0xC8 0x00 0xC8 0x00 0x00 0x02 0x00 0x01 0x00 0x80 0x00 0x70 0x7C
Incoming Raw Packet from readFromArm():
verifyPacket Error: No Header!
No Arm Found on port COM3

and then it failed to connect
why this happen ?
thanks