Quote Originally Posted by MCImes View Post
Anyone know what "buffer overflow" means immediately after hitting read>execute?
Obviously you're reading data from an external device. Do you see that data starts to be sent from the sending device? Is this a new problem that has only just occurred?

Buffer overflow alarm normally occurs when the receiving device doesn't send an Xoff handshake signal when software handshaking is used, or doesn't switch the CTS to logic 0 if hardware hand shaking is being used. Alternatively, the sending device does not recognize the handshake, and keeps sending data. In either case the Input Buffer of the receiving device will overflow.

Post more details on the matter so that more considered advice can be given.

Regards,

Bill