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Q: Why is the following the error message generated,"Flash API Error #21 The Erase operation failed the precondition step" while using the CCS flash plugin? ===
A: The most likely cause of this error is accidently stopping the flash erase process before it successfully completes. The error indicates a bad sector or sectors in flash memory. Verify the bad sector(s) by performing the following to avoid using them.
. Invoke the flash plug-in, CCS->Tools-> On-chip programmer.
. Perform the erase operation only on all the sectors. You should see the same error.
. Perform the erase operation only on each individual sectors. By performing this, you should see which of your flash sectors are bad.
