ValueError: chr() arg not in range(256)

[TusharKashyap]

I have written a small script that reads a cap/pcap file, chnages its source mac and destination mac and send it over the wireless network. The error is seen in "Python27\lib\site-packages\scapy\utils.py" file.

error logs:
<Sniffed: TCP:0 UDP:1 ICMP:0 Other:0>
Traceback (most recent call last):
File "C:\scapy_try_1.py", line 57, in
send(inPcapFile)
File "C:\Python27\lib\site-packages\scapy\sendrecv.py", line 270, in send
realtime=realtime, return_packets=return_packets)
File "C:\Python27\lib\site-packages\scapy\sendrecv.py", line 248, in __gen_send
s.send(p)
File "C:\Python27\lib\site-packages\scapy\arch\pcapdnet.py", line 313, in send
sx = str(cls()/x)
File "C:\Python27\lib\site-packages\scapy\packet.py", line 277, in str
return self.build()
File "C:\Python27\lib\site-packages\scapy\packet.py", line 354, in build
p = self.do_build()
File "C:\Python27\lib\site-packages\scapy\packet.py", line 344, in do_build
pay = self.do_build_payload()
File "C:\Python27\lib\site-packages\scapy\packet.py", line 336, in do_build_payload
return self.payload.do_build()
File "C:\Python27\lib\site-packages\scapy\packet.py", line 341, in do_build
pkt = self.self_build()
File "C:\Python27\lib\site-packages\scapy\packet.py", line 332, in self_build
p = f.addfield(self, p, val)
File "C:\Python27\lib\site-packages\scapy\fields.py", line 72, in addfield
return s+struct.pack(self.fmt, self.i2m(pkt,val))
File "C:\Python27\lib\site-packages\scapy\layers\l2.py", line 105, in i2m
return MACField.i2m(self, pkt, self.i2h(pkt, x))
File "C:\Python27\lib\site-packages\scapy\fields.py", line 205, in i2m
return mac2str(x)
File "C:\Python27\lib\site-packages\scapy\utils.py", line 295, in mac2str
return "".join(map(lambda x: chr(int(x,16)), mac.split(":")))
File "C:\Python27\lib\site-packages\scapy\utils.py", line 295, in
return "".join(map(lambda x: chr(int(x,16)), mac.split(":")))
ValueError: chr() arg not in range(256)

Any help is highly appreciated.