Kernel halt after reset

Hi,

I am porting a SDK 2.6.0 project to SDK 2.9.0. It gets built without errors but when I try to run it after flashing I get the following.

[00:00:01.250,885] <err> spinel_ipc_backend: IPC endpoint bind timed out
ASSERTION FAIL @ WEST_TOPDIR/zephyr/drivers/ieee802154/ieee802154_nrf5.c:1228
        802.15.4 serialization error: -6
[00:00:01.250,976] <err> os: r0/a1:  0x00000004  r1/a2:  0x000004cc  r2/a3:  0x00000002
[00:00:01.250,976] <err> os: r3/a4:  0x00000004 r12/ip:  0x0000734c r14/lr:  0x00018c21
[00:00:01.251,007] <err> os:  xpsr:  0x09100000
[00:00:01.251,007] <err> os: s[ 0]:  0xffffffff  s[ 1]:  0x0005380b  s[ 2]:  0x00000000  s[ 3]:  0x00000000
[00:00:01.251,037] <err> os: s[ 4]:  0x00079e68  s[ 5]:  0x2001a0e4  s[ 6]:  0x00000000  s[ 7]:  0x00051f49
[00:00:01.251,037] <err> os: s[ 8]:  0x2000422c  s[ 9]:  0x00052475  s[10]:  0x00000000  s[11]:  0x2001a0e4
[00:00:01.251,068] <err> os: s[12]:  0xffffffff  s[13]:  0x00018c17  s[14]:  0x00079e68  s[15]:  0xfffffffa
[00:00:01.251,098] <err> os: fpscr:  0x00000001
[00:00:01.251,098] <err> os: Faulting instruction address (r15/pc): 0x00052460
[00:00:01.251,129] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:01.251,159] <err> os: Current thread: 0x20004800 (main)
[00:00:02.751,617] <err> os: Halting system
[00:00:01.250,732] <err> spinel_ipc_backend: IPC endpoint bind timed out

I am not sure where to start as this seems Thread related. 

Please help.

Thanks,

kaushalya

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