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Error Code 0x4003000a when opening a file

Todd Pentney

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I'm getting the same issue when trying to open a specific software's Help.pdf. Adobe and Microsoft Edge can open the file. Issue is that because Nitro is set as the default PDF software for our company I would prefer that this was fixed within Nitro. The PDF in question is 180 mb



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  • 3 weeks later...
  • Official Nitronaut
Allain Umailin

Hello @Todd Pentney,

Thank you for reaching out to us through our Community Forums!

For me to better assist you in troubleshooting this issue, could you please provide me with the following?:

-What build of Nitro PDF Pro are you working with? You can find this out by clicking on 'About Nitro Pro' under the Help tab (format is 14.XX.X.XXX, e.g. or you can go to Control Panel > Programs and Features under the Version column. Sending over a screenshot of the 'About Nitro Pro' window will also help me understand what MSI version was used (Retail, Business, NLS, or Enterprise).

-The serial number entered to activate the program. This matters because our business installers are different from the online ones.

Thank you very much in advance and I look forward to hearing back from you.

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