Disable all reset sources during debugging to resolve the issue. More information available here.
Make sure that ICUM is disabled.
Refer to this topic.
Caused by issues in older winIDEA:
Enabled internal watchdog causes that reset invalidates the RAM ECC which silently unloads the Flash monitor and therefor timeout occurs. Use Option Bytes plugin.
Older versions of winIDEA:
F1Kx devices: Contact iSYSTEM technical support to get an updated winIDEA version in which the maximum clock detection is improved.
DisableLockBits option disables the lock bits before erasing the flash. If this option is disabled and the flash sectors are locked, erase operation fails.
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