BackPatch - failed to disassemble MOV instruction

[410172]

Dear forum readers,

at this moment I am trying to test a custom track on Mario Kart Wii that I made myself. When launching the track in Time Trial, I get the error:

BackPatch - failed to disassemble MOV instruction
Error encountered accessing emulated address 2000001c.
Culpit instruction: mov byte ptr ds: [rbx + rdx], cl at (address, various at multiple tries).

Another additional error follows:
BackPatch - Currently only supporting reads. Attempt to write to (address)

Dolphin version: 4.0.2.
Hardware: Acer Aspire V3, Intel i5 2.80 GHz up to 3.20 GHz, 6 GB RAM, Nvidia GeForce 710M 1 GB dedicated video card.
OS: Windows 8.1
DirectX version: DirectX11 on Intel HD Graphics 4000.

Thanks in advance.

[JosJuice]

Try updating to the newest development version.

[410172]

The newest development version does not give that error specifically, it gives me:
Invalid Read from ... (address)
Invalid Write to ... (address)

Why is this? What can I do about it? Custom track sucks or Dolphin related problem?

[magumagu]

Assuming you aren't doing anything exotic with the MMU, "Invalid Read" indicates the game crashed (think SIGSEGV). You can turn on the "Enable MMU" option in the game properties to get it to react more like a Wii would, but that probably won't help in this case.

There is a known bug involving Dolphin's JIT and certain Mario Kart Wii mods where the JIT caches code too aggressively; you can check if you're running into that using Interpreter mode. Otherwise, I would guess it's a bug in your code.

[410172]

Enable MMU option gave me no errors at all, just a black screen. Probably a code bug, yeah. Let's search.