flash app compiled with gcc using DFU with bootloader compiled with keil

[makouda]

I compiled the bootloader and my app with keil arm and I can perform app flashing using DFU, then I compiled the app using gcc, then I can no longer flash using DFU.

is there any issue with flashing an app compiled using gcc with a bootloader compiled with keil arm ?

[Ole Bauck]

I edited the answer, because it is only true for 16KB RAM. I guess you have that (QFAA or QFAB)?