# FAQ.1 — Permission denied / scripts write access on install

## Overview

When `.mzp` install fails with `Permission denied` / Errno 13,  
grant Windows **write permission** to the 3ds Max **scripts** folder.

If it still fails after fixing permissions → **FAQ.2 — Manual install**

### Example error

```text
Installation failed: [Errno 13] Permission denied:
'...\3dsMax\2025 - 64bit\ENU\scripts\startup\os_bipedPlus_menu.ms'
```

---

## 0. Confirm the exact scripts path in 3ds Max (required)

Do **not** guess paths like `%LOCALAPPDATA%\...`.  
Open the folder from the result of a script run in **that Max version**.

1. Launch the **same Max version** that failed  
2. `F11` → MAXScript Listener  
3. Run:

```maxscript
format "userScripts = %\n" (getDir #userScripts)
```

![Listener — userScripts path](00_max_listener_userScripts.png)

> Paste the script into the editor and run it. Listener should show `userScripts = ...\ENU\scripts` and `OK`.

4. Note the `userScripts` path **exactly** as printed. Example:

```text
userScripts = C:\Users\username\AppData\Local\Autodesk\3dsMax\2025 - 64bit\ENU\scripts\
```

> This is the **`scripts` folder** you will grant write access to.  
> Username and version numbers differ per PC — use **only the Listener result**.

5. Note the path, then **quit all Max instances**  
6. In Task Manager, end any leftover `3dsmax.exe`

---

## 1. Open scripts folder Properties

1. Paste the **`userScripts` path from step 0** into Explorer’s address bar  
   (a trailing `\` is fine)
2. Press Enter to open that `scripts` folder  
3. Right-click empty space or the folder → **Properties**

![scripts folder — Properties](01_scripts_properties.png)

> Grant permission on the **`scripts` folder** (do not stop at `startup` alone).

---

## 2. Check your account on the Security tab

1. Open the **Security** tab  
2. Select your **currently signed-in Windows user**  
   - Do not look only at `Administrators` — select your own account  
3. Under **Allow**, confirm **Full control / Modify / Write**  
4. If missing or incomplete, click **Edit**

![Security tab](02_security_tab.png)

---

## 3. Allow permissions and confirm

1. Select your account again  
2. Check **Allow → Full control**  
   - Minimum: Modify, Write  
3. **OK** → Apply → OK  

![Edit permissions — Allow](03_edit_permissions.png)

> If your account is not in the list:  
> **Add** → enter username → Check Names → allow Full control

---

## 4. Remove startup files, then reinstall

1. Go into **startup** inside the userScripts folder above  
2. If these files exist, **delete** them (files marked with a red X):
   - os_bipedPlus_menu.ms
   - os_bipedPlus_path.ms

![Delete os_bipedPlus_menu.ms and os_bipedPlus_path.ms in startup](04_delete_startup_ms.png)

3. **Fully quit 3ds Max, then restart it.**  
4. After restart, **drag-and-drop the matching .mzp** to install.  
   (No manual file copy needed — just reinstall with the .mzp.)

---

## If it still fails

→ Continue with **FAQ.2 — Manual install**

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