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High Quality Content by WIKIPEDIA articles! In the case of program checks and operating system abends, the address of the failing instruction is the one in which you are interested. In the case of runaway task abends, the address of the instruction in which you are interested is the one identified by the Next Sequential Instruction (NSI) in the Program status word (PSW). Because of the hardware/microcode, after an instruction is fetched for execution, the PSW is updated to point to the NSI before the instruction is performed.

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High Quality Content by WIKIPEDIA articles! In the case of program checks and operating system abends, the address of the failing instruction is the one in which you are interested. In the case of runaway task abends, the address of the instruction in which you are interested is the one identified by the Next Sequential Instruction (NSI) in the Program status word (PSW). Because of the hardware/microcode, after an instruction is fetched for execution, the PSW is updated to point to the NSI before the instruction is performed.