UniTransaction throwing NullReferenceException

Question

I'm trying to begin a transaction however on calling the .Begin() method throws a NullReferenceException and the stacktrace shows that it is coming from IBMU2.UODOTNET.UniTransaction.ServerTransaction(Int32 aKey).

Has anyone successfully used UniTransaction, if so is there something that i'm missing?

// note: Session is already connected 
// and can do UniFile operations prior to this point.

UniTransaction transaction = session.CreateUniTransaction();
transaction.Begin(); // throws NullReferenceException

Note: The system is a UniData system and not a UniVerse system. Not sure if that makes a difference.

Answer 1

Are you able to supply more code?

As a start, maybe moving the session.CreateUniTransaction before you do the session.CreateUniFile.

Not sure if it will help (because we are currently using the COM UniObjects not the .NET library), but that is how they have it in the example in uonet.pdf