Getting error flash loader error while debugging in STM32L151RBT6 using IAR. It is showing User error:Reset failed-target not halted.

[PKuma.12]

Hi I am using STM32L151RBT6 controller card. This was working properly also there was no issue in debugging. I am using IAR Embedded Workbench 6.4.

I Added this line to my code: FnEraseEpromWord(0x080800F5,1); as because I want to erase data for this address. After executing this line debugger was stopped.

After that I am not able to debug my code this shows following errors:

1. User Error: Reset failed-Target not Halted.
2. failed to load flash loader.

Please help to find out the solution.

Thank you.