ImportError: No module named builtins

[thala7]

Hi ,
I am working with SocRocket TLM model in my project. While Executing the program I am getting this error .
How could i solve this problem?.
Thank you
with regards
Karthik

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[karthik7@eduroam-pool12-1346 core]$ core/tools/execute leon3mp sdram hello
/home/karthik7/socrocket2/core/build/core/platforms/leon3mp/leon3mp.platform --loadelf "rom=/home/karthik7/socrocket2/core/build/core/software/prom/sdram/sdram.prom" --loadelf "sdram=/home/karthik7/socrocket2/core/build/core/software/grlib_tests/hello.sparc(0x40000000)" --intrinsics "leon3_0=/home/karthik7/socrocket2/core/build/core/software/grlib_tests/hello.sparc(standard)"

    SystemC 2.3.1-Accellera --- Feb 22 2017 12:15:17
    Copyright (c) 1996-2014 by all Contributors,
    ALL RIGHTS RESERVED

Traceback (most recent call last):
File "/home/karthik7/socrocket2/core/build/.conf_check_venv/lib/python2.7/site-packages/usi/init.py", line 12, in
from builtins import object
# ImportError: No module named builtins
core/tools/execute: line 31: 26971 Segmentation fault (core dumped) $platform --loadelf "rom=$prom" --loadelf "sdram=$ram(0x40000000)" --intrinsics "leon3_0=$ram(standard)" $@

real 0m0.586s
user 0m0.089s
sys 0m0.040s
!!! Failed! Try:
gdb -ex run -ex bt --args /home/karthik7/socrocket2/core/build/core/platforms/leon3mp/leon3mp.platform --loadelf "rom=/home/karthik7/socrocket2/core/build/core/software/prom/sdram/sdram.prom" --loadelf "sdram=/home/karthik7/socrocket2/core/build/core/software/grlib_tests/hello.sparc(0x40000000)" --intrinsics "leon3_0=/home/karthik7/socrocket2/core/build/core/software/grlib_tests/hello.sparc(standard)