java.lang.ArrayIndexOutOfBoundsException: -1
at net.torocraft.minecoprocessors.processor.Processor.processRet(Processor.java:533)
at net.torocraft.minecoprocessors.processor.Processor.process(Processor.java:372)
at net.torocraft.minecoprocessors.processor.Processor.tick(Processor.java:301)
at net.torocraft.minecoprocessors.blocks.TileEntityMinecoprocessor.func_73660_a(TileEntityMinecoprocessor.java:129)
at net.minecraft.world.World.func_72939_s(World.java:1802)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:621)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:720)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:624)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:149)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482)
at java.lang.Thread.run(Thread.java:748)

Try write simple loop:

mov ports, 1000b
mov b, 0
mov a, 20
mul 20
loop:
cmp pr, 1
jz loop
cmp a, b
jnz pulse
jz to
jmp loop
pulse:
mov b, 0
mov pl, 15
ret
to:
mov pl, 0
inc b
ret

crash-2017-08-25_23.49.57-server.txt

Thanks for reporting this. You need execute a call before ret, however that should only crash the redstone processor and not the entire game.

Thanks for answer. Good luck u