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Activation error -24

Wes Vergara

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Wes Vergara


I am trying to activate my nitro pdf12 on another computer, but had an error " -24:Activation Error"

I am allowed to activate 2 activation..

Appreciate your help..

Thank you very much

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Allain Umailin

Hello @Wes Vergara,

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

Please be aware that we have upgraded our servers and has shutdown the one your older version of Nitro Pro runs on so please install Nitro Pro using below direct MSI links:

x32 http://install.nitropdf.com/professional_12169574/en/retail/nitro_pro12_ba_x86.msi
x64 http://install.nitropdf.com/professional_12169574/en/retail/nitro_pro12_ba_x64.msi 

To know if you have 32-bit or 64-bit, please refer to this article:

After installation, you can activate by opening Nitro Pro, clicking on the Help tab > About Nitro Pro > Activate by entering the same serial number 234600-xxxxxx-738726

Thank you for choosing Nitro and I hope this helps.

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Wes Vergara

Hi AllainU,


Thank you for the response. After I installed the Nitro Pro, the  Nitro is already activated, the serial is already there. I am not sure why this is happened.

I think maybe because during my previous installation before I got the error (?), Anway, Thank you very much for the support. I post if found any probems..


Thank you very much



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