• Sage 2018 - upgraded to 2019 and then downgraded back to 2018, now API won't work

    We have written a program for one of our clients using the Sage Peachtree API. Every time they upgrade versions, we always have to get the latest DLLs and rebuild our app to make it work again. However recently they say that they installed Sage 2019,…
  • CriptographicException and System.InvalidOperationException

    I can hit all the sample databases and my private database locally; however, when deployed I get this exception: System.Security.Cryptography.CryptographicException","StackTrace": " at Sage.Peachtree.API.PeachtreeSession.VerifyOrRequestAccess(CompanyIdentifier…
  • Using SDK - COM Interface and the CSSDK sample app with Sage-50-US 2014 - Getting unknown error when I run sample app and Sage-50 is not running.

    Hello, I recently subscribed to the Sage Silver Partner program. I have installed the Sage-50-US 2014 app that came with the program. I have also opened the sample app CSSDK that utilizes the COM interface SDK (because I want to create/import Purchase…
  • Sage 50 2016 SDK - The type or namespace name 'Sage' could not be found (are you missing a using directive or an assembly reference?)

    Hi, I tried to connect to Sage 50 2016 but It is impossible, when I compile my code, I get this error: Error 4 The type or namespace name 'Sage' could not be found (are you missing a using directive or an assembly reference?) It is a little weird…
  • C# GetApplication returns null with Peachtree 2008

    I am creating an automated import of Purchase Invoices for a client who is using Peachtree 2008 Premier, and I've downloaded Sage 50 2016.0 SDK. I'm using the credentials that were provided when I downloaded the SDK and the function returns NULL. When…