Unhandled exception: Value cannot be null. Parameter name: File path

[Carlito178]

Good Morning, I have made a backup file from my computer and imported it on another computer, but now Ninja keeps giving me this message when I try to open it.


Does anyone know how to fix this?


Regards,
Carlito178

[NinjaTrader_Marco]

Hello,

Thanks for your post.

Does the new computer have OneDrive controlling the Documents folder?

There are times that One Drive and NinjaTrader 8 are able to coexist on a PC and there are times that they are not.

• If you do not actively use One Drive and only have it on your PC because it came with it installed, I could provide instructions on how to stop the One Drive from backing up your Documents folder so that it does not interfere with NinjaTrader.
• This would at least remove One Drive as being a possibility that this behavior is occuring.

As a test before going the route above, please try to simply uninstall the NinjaTrader platform and then reinstall NinjaTrader from the

• If you run into an error where the platform is not able to be uninstalled, please use the publicly available link below to download a windows utility that will help you uninstall NinjaTrader 8:
  • https://support.microsoft.com/en-us/...b-e9f927e1eb4d
• After uninstalling, please use the following link to redownload the update/install file and reinstall NinjaTrader 8:
  • www.NinjaTrader.com > Enter your email > Submit > Download > Click the file > Run > Click next until installed
  • Test for issues

If you are still running into errors, you may follow along with this infographic I created on stopping One Drive from backing up the Documents folder to remove it as a factor.

• If you do this process, please create a backup file of your platform first so you can reimport everything as this process will result in a fresh installation of NinjaTrader. Otherwise, you will have to manually move the files.
• https://www.screencast.com/t/2pKLiLVJm

Please let me know if I may be of any further assistance.

[Carlito178]

Thank you, the re install worked. I had to put the old NinjaTrader 8 folder in a different folder for back up first, for it to work.