i got errors 

ERROR: arago-base-tisdk-image-1.0-r0 do_image_complete: Error executing a python function in exec_python_func() autogenerated:

The stack trace of python calls that resulted in this exception/failure was:
File: 'exec_python_func() autogenerated', lineno: 2, function: <module>
     0001:
 *** 0002:sstate_task_postfunc(d)
     0003:
File: '/home/sridhar/tisdk_04_01/sources/oe-core/meta/classes/sstate.bbclass', lineno: 672, function: sstate_task_postfunc
     0668:
     0669:python sstate_task_postfunc () {
     0670:    shared_state = sstate_state_fromvars(d)
     0671:
 *** 0672:    sstate_install(shared_state, d)
     0673:    for intercept in shared_state['interceptfuncs']:
     0674:        bb.build.exec_func(intercept, d, (d.getVar("WORKDIR", True),))
     0675:    omask = os.umask(0o002)
     0676:    if omask != 0o002:
File: '/home/sridhar/tisdk_04_01/sources/oe-core/meta/classes/sstate.bbclass', lineno: 276, function: sstate_install
     0272:
     0273:    # Run the actual file install
     0274:    for state in ss['dirs']:
     0275:        if os.path.exists(state[1]):
 *** 0276:            oe.path.copyhardlinktree(state[1], state[2])
     0277:
     0278:    for postinst in (d.getVar('SSTATEPOSTINSTFUNCS', True) or '').split():
     0279:        # All hooks should run in the SSTATE_INSTDIR
     0280:        bb.build.exec_func(postinst, d, (sstateinst,))
File: '/home/sridhar/tisdk_04_01/sources/oe-core/meta/lib/oe/path.py', lineno: 81, function: copyhardlinktree
     0077:    if (os.stat(src).st_dev ==  os.stat(dst).st_dev):
     0078:        # Need to copy directories only with tar first since cp will error if two
     0079:        # writers try and create a directory at the same time
     0080:        cmd = "cd %s; find . -type d -print | tar --xattrs --xattrs-include='*' -cf - -C %s -p --no-recursion --files-from - | tar --xattrs --xattrs-include='*' -xf - -C %s" % (src, src, dst)
 *** 0081:        subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
     0082:        source = ''
     0083:        if os.path.isdir(src):
     0084:            import glob
     0085:            if len(glob.glob('%s/.??*' % src)) > 0:
File: '/usr/lib/python3.4/subprocess.py', lineno: 620, function: check_output
     0616:            process.wait()
     0617:            raise
     0618:        retcode = process.poll()
     0619:        if retcode:
 *** 0620:            raise CalledProcessError(retcode, process.args, output=output)
     0621:    return output
     0622:
     0623:
     0624:def list2cmdline(seq):
Exception: subprocess.CalledProcessError: Command 'cd /home/sridhar/tisdk_04_01/build/arago-tmp-external-linaro-toolchain/work/am335x_evm-linux-gnueabi/arago-base-tisdk-image/1.0-r0/deploy-arago-base-tisdk-image-image-complete; find . -type d -print | tar --xattrs --xattrs-include='*' -cf - -C /home/sridhar/tisdk_04_01/build/arago-tmp-external-linaro-toolchain/work/am335x_evm-linux-gnueabi/arago-base-tisdk-image/1.0-r0/deploy-arago-base-tisdk-image-image-complete -p --no-recursion --files-from - | tar --xattrs --xattrs-include='*' -xf - -C /home/sridhar/tisdk_04_01/build/arago-tmp-external-linaro-toolchain/deploy/images/am335x-evm' returned non-zero exit status 2

Subprocess output:
tar: .: Cannot utime: Operation not permitted
tar: Exiting with failure status due to previous errors

ERROR: arago-base-tisdk-image-1.0-r0 do_image_complete: Function failed: sstate_task_postfunc
ERROR: Logfile of failure stored in: /home/sridhar/tisdk_04_01/build/arago-tmp-external-linaro-toolchain/work/am335x_evm-linux-gnueabi/arago-base-tisdk-image/1.0-r0/temp/log.do_image_complete.17846
ERROR: Task (/home/sridhar/tisdk_04_01/sources/meta-arago/meta-arago-distro/recipes-core/images/arago-base-tisdk-image.bb:do_image_complete) failed with exit code '1'
NOTE: Tasks Summary: Attempted 4480 tasks of which 4479 didn't need to be rerun and 1 failed.