with the same code cubeIDE is not able to program and debug but Keil is.

i installed the ide and used it for 2 or 3 program. it was working fine. programming was OK. debug was OK. 

but after a while the MCU was always falling into hardfault.

after 10 times of programming and changing the code it was stock in wierd lines of code. i couldn't even imagine the reason. at first i thought it is the code problem but i open the exact same project with cubeMX in keil and the code was working OK!!!!

what is happing here???