Other way to create transaction than TBXTransaction::BeginTransaction()

Question

I am having a problem with my code. I get an intermittent error that the capacity/limit for the transaction is already reached.

However, I already checked the BeginTransaction and CommitFreeAndNil call with my code and it does delete all transaction. I also checked my whole code and there are no other instance of the BeginTransaction.

I even watched the FTransactionCount and it is just zero. So, I was wondering why can't I create a transaction at times.