Hardfault error at timer callback

[Nirbhik]

The thing is,i have a custom design board with STM32F446RE  and it's Nucleo variant
i have a code with multiple timers but when i run the program on my custom board it goes to Hardfault error after a timer callback but the same problem dosent happens with the Nucleo board although the code remains the same

[mƎALLEm]

Hello @Nirbhik and welcome to the community.

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@Nirbhik wrote:

The thing is,i have a custom design board with STM32F446RE  and it's Nucleo variant.

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What do you mean by variant. is it Blue/Black pill board?

Do you have the same Clock source and frequency values?

[Nirbhik]

i have the NUCLEO-F446RE and yes i have the same clock source as i am using the same clock based on the internal oscillator

[Tesla DeLorean]

Don't discount bad design

Make sure clock expectations are the same, make sure VCAP capacitors are correctly rated as designed/populated. You've got 4u7 F between them, and see 1.25V

Check FLASH wait states.

Root Cause the HARD FAULT, with a handler that does a better job than while(1) silently dying.

[Nirbhik]

Yes i hadn't placed a capacitor at the Vcap pin 
also about your last statement
"Root Cause the HARD FAULT, with a handler that does a better job than while(1) silently dying."
i use the debug tools of ST and i was able to pinpoint the error because of the call stack whose image i am attaching below