NinjaTrader Latest Version 8.1 won't launch on windows 11

[iamgeek]

NinjaTrader Latest Version 8.1 won't launch on windows 11 after successful login. I have already logged in an using the latest version on my old computer for a long time now. I wanted to launch NT on a new laptop. I downloaded the software from the NT website after successfully logging in. I had 2 factor authentication on and also followed the link sent to my email to allow the device new device. Now when I login using my credentials, the logo appears for couple of seconds and then nothing. The NT doesn't launch as if it crashed. No idea what to do to fix this issue. Please help. This is urgent.

[backtester831]

You can try deleting the UI file in the NinjaTrader 8 folder, that's worked for me in the past

[NinjaTrader_Erick]

Hello iamgeek,

Thank you for your post.

Yes, backtester831 's advise may very well resolve your issue.

To resolve this, try to reset your UI file:

-Shut down NinjaTrader 8
-Go to Documents -> NinjaTrader 8 -> UI.xml
-Highlight the UI.xml file -> Right Click -> Rename -> OldUI.xml




Then try to launch NT8 Desktop once again.

If it still will not launch, additionally run a platform repair.

To complete a repair, do the following:

• Shut down NinjaTrader 8
• Go to your computer's Control Panel > Programs & Features (Note: search for 'Control Panel' to find it within the Windows Start Menu. This will be a different window than the Settings page)
• Left-click once on NinjaTrader 8 > select 'Repair' above the list of available programs
• Restart the platform after it finishes repairing, and test for this behavior again.
• Here is a video I made for your reference.https://www.screencast.com/t/5RH7MjuaQiG

Please me know the results of this test. I look forward to your response.



If it still will not properly launch:

Please try testing your platform in Safe Mode to verify if this behavior is being caused by a 3rd-party add-on or isolated to the last active workspace, using the steps below.

Safe Mode will prevent NinjaTrader from:

• Loading workspaces and connecting on start-up.
• Loading custom assemblies (i.e. 3rd-party add-ons and NinjaScripts)
• Getting instrument updates from the server

To enable Safe Mode, you can use the following steps:

• Shut down NinjaTrader.
• Click on the Windows Start Button
• Search for and Launch NinjaTrader (Safe Mode)
• You may then verify you are in Safe Mode by going to Help -> About.

Once you have opened the platform in Safe Mode:

• Reconnect to your Data Provider
• Please open a new chart with no custom bar types/indicators/templates and test for issues.

Does the behavior persist on this blank Workspace in Safe Mode?

• If not, please try opening your previous workspace by going to the Control Center > Workspaces drop-down. It may already show as being open. Hit 'close' and do not save and then re-open it again for your windows to re-appear. You will notice that no 3rd-party add-ons are running in Safe Mode.

Does the behavior return on your regular Workspace in Safe Mode?

• If not, restart NinjaTrader, and test for the behavior on your Workspace normally once more with your 3rd-party add-ons available. If this reintroduces issues, I suggest rebuilding your workspace, adding 1 add-on at a time.
• Please keep track of what add-ons you add back in to identify the cause of the behavior if it returns.

If it does not return, it indicates the error was isolated only to your other Workspace. I also suggest making a backup of your workspace so we can restore a working version of it if the issue returns. You will want to keep this backup file on an external hard drive or uploaded to a cloud drive such as Google Drive, Dropbox, or OneDrive.

To create a backup, go to the Control Center > Tools > Export > Backup File. Additional information about backups may be read in our Help Guide linked below.

• NinjaTrader 8 Help Guide — Backup and Restore

Please let me know the results of this test. I look forward to your response.