STM32F103C8 - IAR throws error while downloading code with ST-Link

Hi,

Tue Jul 26, 2016 16:22:30: IAR Embedded Workbench 7.1 (armproc.dll) 

Tue Jul 26, 2016 16:22:30: Loaded macro file: D:\Programme\IARWorkbench_STM32\arm\config\debugger\ST\STM32F1xx_XL.dmac 

Tue Jul 26, 2016 16:22:30: Loaded macro file: D:\Programme\IARWorkbench_STM32\arm\config\flashloader\ST\FlashSTM32F10xxx.mac 

Tue Jul 26, 2016 16:22:33: Connected to ST-Link/V2 [SWD mode 50 kHz] Firmware V2.JS6 (Probe no: 28611187) 

Tue Jul 26, 2016 16:22:33: Software reset was performed 

Tue Jul 26, 2016 16:22:33: Initial reset was performed 

Tue Jul 26, 2016 16:22:35: Warning: Write failed (CPU data abort) at Memory address 0x1FFFF800 

Tue Jul 26, 2016 16:22:35: Reset FLASH readout protection 

Tue Jul 26, 2016 16:22:35: Hardware reset with strategy 2 was performed 

Tue Jul 26, 2016 16:22:35: 736 bytes downloaded (2.42 Kbytes/sec) 

Tue Jul 26, 2016 16:22:35: Loaded debugee: D:\Programme\IARWorkbench_STM32\arm\config\flashloader\ST\FlashSTM32F10xxxRAM10K.out 

Tue Jul 26, 2016 16:22:35: Target reset 

Tue Jul 26, 2016 16:22:37: Unloaded macro file: D:\Programme\IARWorkbench_STM32\arm\config\flashloader\ST\FlashSTM32F10xxx.mac 

Tue Jul 26, 2016 16:22:37: The flash loader program reported an error. 

Tue Jul 26, 2016 16:22:38: IAR Embedded Workbench 7.1 (armproc.dll)