After using the APPROTECT function, complete erasure became impossible.that right?

My customer is now unable to disable secure erasure after using the APPROTECT function. Is this correct?

Please let me know if there is another way to check this.

”nrfjprog --recover”log

PS C:\Users\hoko> nrfjprog --memrd 0x10001200 --n 4
0x10001200: FFFFFFFF |....|
PS C:\Users\hoko> nrfjprog --memrd 0x10001004 --n 4
0x10001004: FFFFFFFF |....|
PS C:\Users\hoko> nrfjprog --log --recover --clockspeed 1000
Recovering device. This operation might take 30s.
Erasing user code and UICR flash areas.
Writing image to disable ap protect.

Flash Programer Check Image.

Erase Log (Flash Programmer)

20:13:30.343   Device connected with the serial number 000483012562

20:13:52.798   Getting serial port options from the persistent store for 000483012562.pc-nrfconnect-programmer

20:13:52.799   Device connected with the serial number 000483012562

20:13:55.525   Selecting device with the serial number 000483012562

20:13:56.354   Selected device with the serial number 000483012562

20:13:56.354   Using nrfutil device to communicate with target via JLink

20:13:56.355   JLink OB firmware version J-Link OB-SAM3U128 V3 compiled Sep 13 2023 14:47:14

20:13:56.355   Device family

20:13:56.355   Device version

20:13:56.356   Board version

20:13:57.395   Reading readback protection status for Application core

20:13:57.396   Reading readback protection status for Application core 0%

20:13:57.417   Reading readback protection status for Application core 100%

20:13:57.417   Application core protection status 'NRFDL_PROTECTION_STATUS_ALL'

20:13:57.420   Reading readback protection status for Application core completed

20:13:57.551   Skipping reading core Application information as it is protected.

20:13:59.827   Reading readback protection status for Application core

20:13:59.828   Reading readback protection status for Application core 0%

20:13:59.845   Reading readback protection status for Application core 100%

20:13:59.845   Application core protection status 'NRFDL_PROTECTION_STATUS_ALL'

20:13:59.846   Reading readback protection status for Application core completed

20:13:59.991   Device is loaded and ready for further operation

20:14:03.977   Recovering Application core

20:14:03.978   Recovering Application core 0%

20:14:06.081   Recovering Application core 100%

20:14:06.082   Recovering Application core completed

20:14:06.082   Loading core information for Application core

20:14:06.083   Loading core information for Application core 0%

20:14:06.109   Loading core information for Application core 100%

20:14:06.111   Loading core information for Application core completed

20:14:09.171   Reading readback protection status for Application core

20:14:09.172   Reading readback protection status for Application core 0%

20:14:09.180   Reading readback protection status for Application core 100%

20:14:09.180   Application core protection status 'NRFDL_PROTECTION_STATUS_NONE'

20:14:09.181   Reading readback protection status for Application core completed

20:14:19.528   Reading memory for Application core

20:14:19.529   Reading memory for Application core 0%

20:14:23.133   Reading memory for Application core 100%

20:14:23.605   Reading memory for Application core completed

20:14:23.607   Parse memory regions for Application core

Thanks

Hoko

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