Being a DIK Season 3 “m_c3 Is Not Defined” Error: Fix the Phone Chat Crash

Getting NameError: m_c3 is not defined in Being a DIK Season 3? Here’s what the traceback means, what to check first, and how to rule out bad saves, mods and incomplete game files.

Quick Answer:

If Being a DIK Season 3 crashes with NameError: m_c3 is not defined, first verify the game through Steam and test an unmodified Season 3 installation. Make sure your Season 2 save was transferred through Season 3’s Import menu rather than opened incorrectly through Continue.

If Being a DIK Season 3 suddenly stops with an uncaught Ren’Py exception containing:

NameError: Name 'm_c3' is not defined

and the traceback points toward:

mphone_chat_app.rpy

The important clue is not the generic “uncaught exception” message.

It is m_c3 is not defined.

That tells us the game’s phone/chat code tried to access a variable that was not available in the current game state.

The safest troubleshooting order is:

1. Update to Being a DIK Season 3.
2. Verify the Season 3 installation through Steam.
3. Remove or temporarily disable mods.
4. Confirm the save was transferred into Season 3 correctly.
5. Test another clean imported save if available.
6. If the same error survives a clean installation and valid save, treat it as a likely game-side bug instead of editing the save manually.

Here’s how to do that without turning one missing Ren’Py variable into five new problems.

What Does “m_c3 Is Not Defined” Mean?

Being a DIK is built with Ren’Py, and the error itself is a Python-style NameError.

In plain English:

The game tried to use m_c3, but that variable did not exist in the state available at that moment.

That does not automatically tell us why the variable is missing.

Possible causes include:

Possible cause	Why it matters
Incompatible save state	The save may not contain data expected by the current Season 3 script
Incorrect Season 2 → Season 3 transition	Season 3 uses a specific import system
Old or incompatible mod	Modified scripts can expect variables that the current build does not provide
Incomplete/corrupt game files	An updated script may be paired with older or damaged data
Game bug	A valid progression path may fail to initialize the variable

So don’t jump straight to save editing.

That is usually where troubleshooting starts becoming archaeology.

1. Update Being a DIK Season 3 First

Before changing anything, completely close the game and restart Steam.

Open:

Steam → Library → Being a DIK → Downloads

Allow any pending update to complete.

Season 3 was released on Steam on September 1, 2026, so early post-launch fixes are particularly important right now.

Restart Steam after the update and test the same scene again.

If it works, stop there.

Don’t keep “fixing” a game that is no longer broken.

2. Verify Being a DIK Season 3 Files Through Steam

If the error remains:

Steam → Library → Being a DIK → Properties → Installed Files → Verify integrity of game files

Let Steam finish checking everything.

Verification is especially important after an update because a mismatched script/data combination can produce errors that look like save corruption.

Once verification completes:

1. Close Steam.
2. Reopen it.
3. Launch Season 3.
4. Load the same progression point.
5. Test the phone/chat action again.

If Steam replaces files during verification, make a note of that.

3. Make Sure You Are Actually Launching Season 3

Being a DIK Season 3 does not simply run inside the original executable.

The developer’s official Steam instructions state that Season 3 has its own executable, and Steam presents separate launch options for Seasons 1 & 2 and Season 3.

When you click Play, make sure you select:

Being a DIK — Season 3

not the Seasons 1 & 2 installation.

This sounds painfully obvious until Steam shortcuts start doing Steam-shortcut things.

4. Import the Season 2 Save Correctly

This is one of the most important checks.

The developer says Season 3 requires a save exported from the end of Episode 8 in Season 2. That save must then be opened through Season 3’s Import option.

The correct sequence is:

Finish Episode 8 in Season 2
        ↓
Use the Save Transfer interface
        ↓
Launch Being a DIK Season 3
        ↓
Choose Import
        ↓
Select the transferred Season 2 save
        ↓
Start Season 3

Do not confuse:

Import

with:

Continue

The developer specifically distinguishes them: Import is for Season 2 transfer saves; Continue is for saves already created inside Season 3.

If your m_c3 error began after trying to resume old progress, this distinction is worth checking before anything more aggressive.

Internal link

Naturally link the phrase Being a DIK Season 3 save errors to your previous article:

https://axeetech.com/being-a-dik-season-3-jade-state-is-not-defined-fix/

Suggested sentence:

If your traceback mentions jade_state instead of m_c3, use our separate Being a DIK Season 3 jade_state is not defined fix, because that is a different missing-state error.

5. Temporarily Remove Being a DIK Mods

If you’ve installed:

• walkthrough mods
• cheat mods
• relationship/stat mods
• UI modifications
• modified .rpy or .rpyc scripts
• old Season 3 mod files

test the game without them.

Do not simply install a newer mod over an older version and assume everything was replaced.

For troubleshooting, you want to establish one simple fact:

Does the official unmodified game still produce the m_c3 error?

Back up your saves first, then temporarily move third-party files out of the game installation rather than deleting everything blindly.

After removing mods:

Steam → Verify integrity of game files

again. Then retest. If the error disappears, reinstall compatible mods one at a time.

6. Test Another Properly Imported Save

If you created several Season 2 transfer saves, try another one.

This is a useful diagnostic test because it separates:

installation-wide problem

from:

save-specific problem.

Result A: Every valid imported save crashes

That makes a game-file, mod or current-build issue more likely.

Result B: Only one imported save crashes

That points more strongly toward that progression path or save state.

Do not overwrite the problematic save while testing.

Keep it available in case the developer needs it for debugging.

7. Do Not Manually Add m_c3 to the Save

You may eventually find advice telling you to open Ren’Py save data or console commands and simply create:

m_c3 = ...

Don’t do that unless the developer explicitly documents the expected value.

The problem is obvious: knowing that a variable is missing does not tell you what its correct value should be.

Setting the wrong state could:

• skip dialogue
• unlock the wrong chat
• corrupt relationship conditions
• break later scenes
• create another missing-state error farther into the episode

A clean fix restores the game’s expected state. It does not invent one.

8. What If Steam Verification and a Clean Save Still Crash?

At that point, stop cycling through random Windows fixes.

If all of these are true:

• latest Season 3 build
• Steam files verified
• no mods
• valid imported Episode 8 save
• multiple saves tested
• same m_c3 traceback remains

then you have strong evidence that the problem requires a game-side script fix.

Capture the full traceback. Important lines include:

Being a DIK version
Ren'Py version
mphone_chat_app.rpy
episode/freeroam script name
line number
NameError: Name 'm_c3' is not defined

Also record exactly what you clicked immediately before the crash.

That is vastly more useful to a developer than:

game broken pls fix.

Should You Press “Ignore” on the Ren’Py Error?

Ren’Py may sometimes offer Ignore.

You can test it if you have already saved, but I would not use Ignore as the permanent solution to a state-variable error.

The scene may continue while leaving part of the phone/chat state uninitialized.

If the error returns—or the phone interface behaves incorrectly—load your previous save instead.

Quick Fix Checklist

Check	Recommended action
Pending Steam update	Install it
Corrupt game files	Verify integrity
Wrong executable	Launch Season 3
Season 2 save	Use Season 3 Import
Mods installed	Test without them
One save only crashes	Try another transfer save
Every clean save crashes	Likely needs game patch
Internet suggests manual variable editing	Avoid unless developer documents it

Frequently Asked Questions

What is m_c3 in Being a DIK?

The traceback shows m_c3 is a variable requested by the game’s Ren’Py scripts, particularly around the phone/chat system. The error itself does not reveal what value the variable should contain.

Does verifying Steam files delete my Being a DIK saves?

Steam’s file-verification function primarily checks installed game files. Still, back up important saves before troubleshooting any game where progression matters.

Should I use Import or Continue for a Season 2 save?

Use Import. The developer explicitly says Import is for transferred Season 2 saves, while Continue is for progress already created inside Season 3.

Can a mod cause m_c3 is not defined?

Yes, an incompatible modified script can create state or script mismatches. Test an unmodified installation before blaming the save itself.

What if jade_state is not defined instead?

That is a separate variable error. Link readers to:

/being-a-dik-season-3-jade-state-is-not-defined-fix/

Is there a guaranteed m_c3 fix yet?

Not enough verified evidence exists to call one workaround universal. The best approach is to isolate files, mods and save-transfer state before concluding that the current game build itself requires a patch.