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arm - ARMSim- PC out of valid memory range

I tried executing a very basic addition program on ARMSim, however when I run it, I get PC out of valid memory range. When I try stepping over the code, the value of the registers in hexadecimal do not change. I don't know what I am doing wrong, please help! I'm using Windows 10 and ARMSim 1.91. This is my code:

.text
MOV R0, #10
MOV R1, #20
ADD R2, R0, R1
.end
question from:https://stackoverflow.com/questions/65874921/armsim-pc-out-of-valid-memory-range

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