Does anyone know what this error is?

[luke22]

I recently uninstalled and reinstalled NT8 and this is the error message that keeps coming up whenever I try and launch the program. Is this a documented issue and if so can someone point me in the direction as how to fix it.

[NinjaTrader_ShawnB]

Hello luke22,

Thank you for your post.

This behavior usually indicates there is another program making changes to NinjaTrader files such as an anti-virus or automatic backup program on your PC.

Do you have any anti-virus software or backup software running on your system?

Ensure exceptions have been added into any firewall/antivirus/backup programs for the Documents/NinjaTrader 8, C:\Program Files (x86)\NinjaTrader 8, and C:\Program Files\NinjaTrader 8 folders?

Then try and reinstall NinjaTrader and test to see if you experience the same.

Please try and download and install NinjaTrader from the following link:

You may download the platform here

Once downloaded, run it and select the 'Repair' option.

Critical: Before running the installer, ensure NinjaTrader is closed.

If you continue to see the same issue. Please send me your log and trace files so that I may look into what occurred. You can do this by using the platform or manually using the steps below:

Please send an email to platformsupport [at] ninjatrader [dot] com with your log and trace files included as an attachment to the email, so I may investigate this matter further.

• Open your NinjaTrader folder under Documents.
• Right click on the 'log' and 'trace' folders and select Send To> Compressed (zipped) Folder.
• Send the 2 compressed folders as attachments to this email.
• Once complete, you can delete these compressed folders.

Put '2948062 - Att Shawn', in the subject field and enable 'Log and trace files'. Also, give a reference of this thread in the body of the email.


We look forward to assisting you further.