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Error 24 : Unable to use my serial number

Firdaus Ahmad

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Firdaus Ahmad


I have problem to activate my pdf Nitro using my serial number. I used it previously at my old laptop then I'm trying to activate it at my new one but error code 24 appear. I had report my problem last week but nobody respond to my message. Please anybody help me....

Thanks a lot..

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  • Official Nitronaut
Reymund Oyong

Hi @Firdaus Ahmad

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

My apologies for any inconvenience this issue has caused.
Please ensure that you have installed the latest build of Nitro Pro 12 which is so you could activate using your existing serial number. 
You can see the version and build of Nitro Pro by going to the Help tab > About Nitro Pro. 

If you are running a different build and version, you can find the Nitro Pro installer from the link below: 
https://www.gonitro.com/nps/product-details/downloads - Click the 'Download Nitro Pro 12' link 

Once Nitro Pro, you can activate it using your current serial number. To activate, go to the Help tab > About Nitro Pro then click the Activate button. 

Kind regards, 

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Firdaus Ahmad

Hi Raymond,

Appreciate for your guidance. Already activated just now :-) 

May I know how many users can use the same serial number?


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