Error running desktop app.

[Retrippj]

Every time I go to run NinjaTrader on my Windows 11 PC I get the following error.

"unable to recover ninjatrader custom assembly access to the path is denied"

My laptop which runs Windows 10 has no issues with running Ninjatrader Desktop app.

My PC is Windows 11 and the Document folder is a part on OneDrive (C:\Users\USERNAME\OneDrive\Documents) Is it possible the issue is with One Drive? I am not sure if this is causing the issue but I also think the Windows 11 has more integrated OneDrive access to the Documents folder than Windows 10 does. Can anyone provide some guidance?

[bltdavid]

Try disabling OneDrive completely before starting NinjaTrader.

[NinjaTrader_Erick]

Hello Retrippj ,

Thank you for reaching out.

As bltdavid has mentioned, this most likely is being caused by a OneDrive process.


When you get this class of error, it indicates that something is blocking NinjaTrader from accessing its own files.

A first step to try, would be to restart your PC, as to end any active process that may be using your NT8 files, then re-launch NT8.

Usually this has to do with any back up software (exOneDrive) or the directory where NT8 files are.

If after restarting your PC you still get that error message I have outlined a few different troubleshooting steps below to combat this error.

Windows Firewall/Anti-Virus

First, please check for any virus protection, firewall, and backup software you may be running, and add exceptions for NinjaTrader so that they do not interfere with NinjaTrader's operation.


Disable Controlled Folder Access

Next, press the "Windows Key" on your keyboard > Search for "Controlled Folder Access" > Click on "Controlled Folder Access" > Turn "Controlled Folder Access" off if it is enabled

• This can be restricted by administrator settings. If you are unable to access this setting, please contact your network/PC administrator.
• Additional information on Controlled Folder Access may be read at this publicly-available link from Microsoft's website: https://support.microsoft.com/en-us/...ndows-security

Uninstall/Reinstall NinjaTrader 8

Please follow the steps listed below to complete a quick uninstall and reinstall NinjaTrader. These directions will keep you from losing any of your information.

• Close all running applications.
• Do not do anything to the Documents/NinjaTrader folder
• Uninstall NinjaTrader within Windows Control Panel.
• Navigate to "C:\ > Program Files (x86)" > or "C:\ > Program Files" Delete the 'NinjaTrader 8' folder if it exists
• Reboot your PC.
• Once these steps are completed, download and install NT8 using the steps below:
  • Login into the NinjaTrader Account Dashboard
  • Click "Download" in the bottom left-hand corner of the sidebar
  • Next select "Download" in the "Most Recent Release" Window in the main screen
  • Once the installation had downloaded, ensure any previous version of NinjaTrader is closed before running the installation package

• Before restarting NinjaTrader, be sure all available updates are installed to your PC from the Windows Settings > Update and Security page.
  • Be sure to manually check for updates here, and reboot after any updates are installed.

Please let me know if these solutions work for you, and feel free to ask any questions you may have as you work.