ARMmbed Cannot build blinky example project!

Intermittent Build failure due to:

Error: L6636E: Pre-processor step failed for ‘/extras/mbed-os.lib/targets/TARGET_STM/TARGET_STM32F4/TARGET_MTS_DRAGONFLY_F411RE/device/TOOLCHAIN_ARM_STD/stm32f411re.sct’

Despite Update All.

Second build following this build create .bin. Any updates to the main.cpp (such as SLEEP_TIME or LOOP count) has no effect. Resultant binary (second build of 2 since 1st yields pre-processor error) has not incorporated the code changes. (ie PRINT_AFTER_N_LOOPS changed to 100 - still executes with original value of 20).


You can see here I have already resorted to building here. With a different set of issues - and still without modifications being incorporated.


Hi Mike,

This was a tricky one for us to find, we believe it should be fixed now. Please let us know if you see a repeat of this issue.

Best Regards,

Appears to be resolved. I buiult and ran then modified, build and ran successfully again - with updated code.

Well done, Skål!

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