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I tried to write this command but it printed an error: Failed to execute 'setblock' as arrow.

This is the command I'm using:

/execute @e[type=minecraft:arrow] -10 8 18 detect ~ ~ ~ gold_block 0 setblock 0 5 0 gold_block 0
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    Please don't post images of your commands, post the actual commands. It makes it a lot easier for us to troubleshoot your issue if it's just the text, and the images gain you nothing. – MBraedley Mar 22 '19 at 13:34
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    What version are you in? This is 1.13 incompatible synax. – SpiceWeasel Mar 23 '19 at 11:53
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    Oh, I know see the problem. You are trying to execute an arrow if it detects a block at its position, but that is impossible unless the arrow is inside the block, which does not happen if you shoot it at the block. – SpiceWeasel Mar 29 '19 at 1:37
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The basic command format is either

/execute [entity or player] x y z detect x y z [type of block]

or

/execute [entity or player] x y z [command].

You cannot use detect and setblock together, in your case.

An alternative can be:

/execute @e[type=minecraft:arrow] -10 8 18 detect ~ ~ ~ gold_block 0 (repeating command block)

then in another cmd block (conditional chain command block),

/execute @e[type=minecraft:arrow] ~ ~ ~ setblock 0 5 0 gold_block 0.

This only works if there is only one existing arrow at a time.

| improve this answer | |
  • "detect" is an addendum to the syntax for /execute and does work with another command. – pppery Aug 26 '19 at 23:57
  • well now you can... i don't think you could have earlier when this post ewas created – villager1 Sep 2 '19 at 22:37

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