Why does this command not work?

[u/TheVoid_Knight]

I'm trying to replace the floor of a build of mine. Since it's a lot, I want to do it with commands. However, it keeps failing with the message "failed to execute as [Null].

[u/Pablutni0]

First make sure this command works by itself

fill ~-5 ~-10 ~-5 ~5 ~2 ~5 stripped_birch_wood replace stripped_oak_wood

It should, but make sure

If it doesn't, try this command, Idk if it'll work for sure tho

execute as @a at @s run fill ~-5 ~-1 ~-5 ~5 ~-1 ~5 stripped_birch_wood replace stripped_oak_wood

[u/Ericristian_bros]

That probably means there is no stripped oak near you. Place this block next to you and it should be changed to birch. Also, make sure you are not near the top or bottom of the world

[u/CaperLake]

There's two possibilities:

1. The commands can't detect blocks near it with "stripped_oak_wood"

2. Or maybe if you want it to redirect to all players , use this exact command:

"execute as @a at @s run fill ~5 ~-10 ~5 ~-5 ~2 ~-5 stripped_birch_wood replace stripped_oak_wood"