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Need help with posbox for raspberrypi 2

Chidozie Kingsley Okonkwo
- 05/30/2016 12:23:40
Hi community; 
I bought a raspberry pi 2 and followed the instructions on how to to create a posbox. Everything went fine. And i can connect to the thermal printer and barcode scanner and do some stuffs. On printing a point of sale receipt, the thermal printer keeps on printing the following error on the thermal paper without stopping.  Please what can i do to resolve this error: 
Error message printed on the thermal roll paper: 
"Trackback (most recent call last): 
File "/home/pi/odoo/addons/hw_escpos/escpos/", line 700 , in receipt print_elem(stylestack, serializer, root) 
File "/home/pi/odoo/addons/hw_escpos/escpos/", line 590, in print_elem(stylestack, serializer, child) 
File "home/pi/0 ..." 

I have tried resolving  printing error, by flashing the sd_card twice with recent and previous versions of the posbox image.