Forced Hardfault (INVPC) Exception Error

Using ARM coretx-M chip set

Getting random  INVPC hard fault exception error, while running iperf tool for measuring n/w throughput.

Hard fault reg: 0x40000000

xPSR: 0x01000000

PRIMASK: 0x00000001

CONTROL: 0x00000000

Please help to find the possible root cause.

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