bitbake linux-yocto-custom -c diffconfig

bitbake linux-yocto-custom -c diffconfig
NOTE: Started PRServer with DBfile: /tmp/yocto-autobuilder/yocto-autobuilder/yocto-worker/poky-custom-rocko-multi-v7-core-image-minimal/build/cache/prserv.sqli
te3, IP: 127.0.0.1, PORT: 39541, PID: 32616
Loading cache: 100% |###########################################################################################################################| Time: 0:00:00
Loaded 1278 entries from dependency cache.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION        = "1.35.0"
BUILD_SYS         = "x86_64-linux"
NATIVELSBSTRING   = "universal"
TARGET_SYS        = "arm-poky-linux-gnueabi"
MACHINE           = "imx6q-phytec-mira-rdk-nand-bsp"
DISTRO            = "poky"
DISTRO_VERSION    = "2.4"
TUNE_FEATURES     = "arm armv7a vfp neon"
TARGET_FPU        = "softfp"
meta
meta-poky
meta-yocto-bsp    = "2017-10-02-rocko-2.4-pre-release:e632745c4e7a39f5461a23a99e72036281c56917"
imx6q-phytec-mira-rdk-nand-bsp = "master:0e7bbb3e6e35e0388864e9c8bce1dda22da30872"

Initialising tasks: 100% |######################################################################################################################| Time: 0:00:00
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
ERROR: linux-yocto-custom-4.9.44+gitAUTOINC+a97a16f18c-r0 do_diffconfig: 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:do_diffconfig(d)
     0003:
File: '/tmp/yocto-autobuilder/yocto-autobuilder/yocto-worker/poky-custom-rocko-multi-v7-core-image-minimal/meta/classes/cml1.bbclass', lineno: 66, function: do_diffconfig
     0062:        bb.fatal("No config files found. Did you do menuconfig ?\n%s" % e)
     0063:
     0064:    if isdiff:
     0065:        statement = 'diff --unchanged-line-format= --old-line-format= --new-line-format="%L" ' + configorig + ' ' + config + '>' + fragment
 *** 0066:        subprocess.check_call(statement, shell=True)
     0067:
     0068:        shutil.copy(configorig, config)
     0069:
     0070:        bb.plain("Config fragment has been dumped into:\n %s" % fragment)
File: '/usr/lib/python3.5/subprocess.py', lineno: 581, function: check_call
     0577:    if retcode:
     0578:        cmd = kwargs.get("args")
     0579:        if cmd is None:
     0580:            cmd = popenargs[0]
 *** 0581:        raise CalledProcessError(retcode, cmd)
     0582:    return 0
     0583:
     0584:
     0585:def check_output(*popenargs, timeout=None, **kwargs):
Exception: subprocess.CalledProcessError: Command 'diff --unchanged-line-format= --old-line-format= --new-line-format="%L" .config.orig .config>/tmp/yocto-autobuilder/yocto-autobuilder/yocto-worker/poky-custom-rocko-multi-v7-core-image-minimal/build/tmp/work/imx6q_phytec_mira_rdk_nand_bsp-poky-linux-gnueabi/linux-yocto-custom/4.9.44+gitAUTOINC+a97a16f18c-r0/fragment.cfg' returned non-zero exit status 1

ERROR: linux-yocto-custom-4.9.44+gitAUTOINC+a97a16f18c-r0 do_diffconfig: Function failed: do_diffconfig
ERROR: Logfile of failure stored in: /tmp/yocto-autobuilder/yocto-autobuilder/yocto-worker/poky-custom-rocko-multi-v7-core-image-minimal/build/tmp/work/imx6q_phytec_mira_rdk_nand_bsp-poky-linux-gnueabi/linux-yocto-custom/4.9.44+gitAUTOINC+a97a16f18c-r0/temp/log.do_diffconfig.32666
ERROR: Task (/tmp/yocto-autobuilder/yocto-autobuilder/yocto-worker/poky-custom-rocko-multi-v7-core-image-minimal/imx6q-phytec-mira-rdk-nand-bsp/recipes-kernel/linux/linux-yocto-custom.bb:do_diffconfig) failed with exit code '1'
NOTE: Tasks Summary: Attempted 24 tasks of which 23 didn't need to be rerun and 1 failed.
NOTE: The errors for this build are stored in /tmp/yocto-autobuilder/yocto-autobuilder/yocto-worker/poky-custom-rocko-multi-v7-core-image-minimal/build/tmp/log/error-report/error_report_20171003130344.txt