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Some RX MCU peripherals use only fixed interrupt vectors, while some others also use software configurable interrupt vectors.
The software configurable interupt vectors can configure which interupt is enable by user depending on the application.
If you use a software configurable interrupt and only configure the "Component tab":
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Please check the r_bsp_interrupt_config.h located in the src/smc_gen/r_config/.
If the software configurable interrupt setting is not applied correctly, the vector table may be set as blank.
Please check from this table in the Users manual: Hardware that you will use depens on the software configurable interrupt.