Hi there,
we purchased a Aspose.Pdf for .NET Developer Small Business licence and run it after develpoment of the first version in productive environment. Now we have to made code changes under Visual Studio at the same company location in the same network by one developer.
In the developer environment we got on the produced pdf file an error note that it is a “Evaluation version” and so we can only fill and test a minor number of the form fields. Even after deploying the updated C# .DLL to productive environment we got the same behaviour and “Evaluation version” error note.
How are we able to make code changes and test it on already deployed Aspose.PDF C# code without getting licence error notes?
BTW: I hope everybody understand that developing and testing in productive environment is not an option. 
Thanks in advance.
Thank you for contacting support.
Please make sure that the license is set successfully as explained in Apply License using File or Stream Object. The license can be validated using below code:
if (Aspose.Pdf.Document.IsLicensed)
{
Console.WriteLine("License set successfully.");
}
In case the issue persists then please create a sample console application containing SSCCE code and your license file by clicking on my username and then message icon, so that we may try to reproduce it and assist you.
Thanks for that hint!
The problem was that the license file was not correct loaded.
Best Regards.
Thank you for your kind feedback.
We are glad to know that your problem has been resolved. Please keep using our API and in event of any further query, feel free to ask.