Fix TWAIN Driver Access Denied Errors in MouthWatch with DEXIS Integration

draft · remote-access twainpermissionsaccess-denied

Generated by docuprocessor (prompt article/v3) · 2026-04-22 10:12

Source thread

thread_id: spaces/AAAA05BdS6s/threads/VWSRFflG5NY · 11 msgs · first 2024-08-19 · participants: Tech ATech B

Tech A 2024-08-19 18:53

Hey guys, any idea about this? I tried to select twain, dexis9 at Mouthwatch capture, but it doesn't work. If i choose twain, and try to take images using twain driver I receive this error:

image/png image.png

**MouthWatch Twain Driver** application is displaying an unhandled exception error dialog with the message: **"Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))"**. The exception text identifies a **System.UnauthorizedAccessException** originating from `System.Runtime.InteropServices.ComTypes.IMoniker.BindToObject`, traced through `Saraff.Twain.DS.Screen.Forms.AcquireForm` methods including `CreateFilter`, `SetupGraph`, and `panel1_Click`. The Intraoral Camera section shows **"USB Video Device"** selected, with **"Use VMR-9 Rendering"** checkbox enabled.

Tech A 2024-08-19 18:53

If I choose Dexis 9, I receive this one

Tech A 2024-08-19 18:53

(no text)

image/png image.png

**DEXcap Message** dialog box displaying the error: **"Couldn't bind moniker to filter object! hr=0x80070005"** with an error (red X) icon. The HRESULT code **0x80070005** corresponds to **E_ACCESSDENIED**. An **OK** button is present to dismiss the dialog.

Tech A 2024-08-19 18:53

I tried to reinstall the drivers, tried to run it as administrator,no luck

Tech B 2024-08-19 18:58

MOuthwatch has the tech articles on their website for the integration steps https://support.mouthwatch.com/hc/en-us/articles/360036749394-MouthWatch-Digital-Imaging-Software-Integration-s

Tech B 2024-08-19 18:58

make sure you have everything aligned to those steps

Tech A 2024-08-19 19:02

Yes, it is configured as the guide says

Tech B 2024-08-19 19:02

it seems like you are having the permissions issue. Can you run Dexis as admin and see if it works?

Tech A 2024-08-19 19:07

Yes, I tried that too, to run dexis and mouthwatch as administrator

Tech B 2024-08-19 19:08

the error states there is access denied. try giving full rights to Dexis and MOuthWatch registry

Tech A 2024-08-19 19:08

The thing that I noticed is that when I try to open the windows camera app I'm not able to give permissions to the app to use the camera.

image/png image.png

The Windows Camera app displays a "We need your permission" dialog requiring Privacy settings access for camera and microphone. The Windows Privacy Settings panel shows **Microphone access for this device is off**, with the "Allow apps to access your microphone" toggle set to **Off**. This is occurring within a **LogMeIn Remote Session** on a machine running **DEXIS** dental imaging software (visible in the taskbar and top-right interface).

---
title: "Fix TWAIN Driver Access Denied Errors in MouthWatch with DEXIS Integration"
category: remote-access
tags: ["twain", "permissions", "access-denied"]
source_thread_id: "spaces/AAAA05BdS6s/threads/VWSRFflG5NY"
source_space: "spaces/AAAA05BdS6s"
generated_at: "2026-04-22T10:12:51"
participants: ["Tech A", "Tech B"]
---

# Fix TWAIN Driver Access Denied Errors in MouthWatch with DEXIS Integration

## Problem

MouthWatch TWAIN driver integration with DEXIS fails with access denied errors when attempting to capture images. When selecting TWAIN driver, the system returns "Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))" with a System.UnauthorizedAccessException. When selecting DEXIS 9 integration, the error "Couldn't bind moniker to filter object! hr=0x80070005" appears. The issue persists even when running both applications as administrator, and the Windows Camera app cannot access camera permissions during remote sessions.

## Resolution

1. Verify MouthWatch integration configuration follows the official guide at https://support.mouthwatch.com/hc/en-us/articles/360036749394-MouthWatch-Digital-Imaging-Software-Integration-s

2. Grant full registry permissions to both DEXIS and MouthWatch applications:
   - Open Registry Editor as administrator
   - Navigate to relevant DEXIS and MouthWatch registry keys
   - Right-click and select Permissions
   - Grant Full Control to the user account

3. Check Windows privacy settings for camera and microphone access:
   - Open Windows Settings > Privacy & Security > Camera
   - Ensure "Camera access for this device" is enabled
   - Enable "Allow apps to access your camera"
   - Repeat for microphone settings if applicable

4. If working in a remote session, camera permissions may be restricted - consider testing locally or adjusting remote session camera redirection settings

## References

- Source discussion: `spaces/AAAA05BdS6s/threads/VWSRFflG5NY`
- Attachments:
  - ![image.png](../attachments/VWSRFflG5NY.Ff93Af6j4zY/image.png) — **DEXcap Message** dialog box displaying the error: **"Couldn't bind moniker to filter object! hr=0x80070005"** with an error (red X) icon. The HRESULT code **0x80070005** corresponds to **E_ACCESSDENIED**. An **OK** button is present to dismiss the dialog.
  - ![image.png](../attachments/VWSRFflG5NY.Qrorwr3CT6A/image.png) — The Windows Camera app displays a "We need your permission" dialog requiring Privacy settings access for camera and microphone. The Windows Privacy Settings panel shows **Microphone access for this device is off**, with the "Allow apps to access your microphone" toggle set to **Off**. This is occurring within a **LogMeIn Remote Session** on a machine running **DEXIS** dental imaging software (visible in the taskbar and top-right interface).
  - ![image.png](../attachments/VWSRFflG5NY.VWSRFflG5NY/image.png) — **MouthWatch Twain Driver** application is displaying an unhandled exception error dialog with the message: **"Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))"**. The exception text identifies a **System.UnauthorizedAccessException** originating from `System.Runtime.InteropServices.ComTypes.IMoniker.BindToObject`, traced through `Saraff.Twain.DS.Screen.Forms.AcquireForm` methods including `CreateFilter`, `SetupGraph`, and `panel1_Click`. The Intraoral Camera section shows **"USB Video Device"** selected, with **"Use VMR-9 Rendering"** checkbox enabled.

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