CSharp AcceptSuite Error code E00117

[livemodelbooks1]

Running the code sample from
https://github.com/AuthorizeNet/sample-code-csharp/blob/master/AcceptSuite/CreateAnAcceptPaymentTran... 

without modification (except adding my own ApiLoginID and ApiTransactionKey) and I get:
     Failed Transaction.
     Error Code: E00117
     Error message: OTS Service Error 'Field validation error.'

Have googled and searched this site and have found very little info or clues as to the problem.

Any suggestions?

[JoelSpencer]

Hello, delegating work to other programmers might be a good solution for you. Check this service out, hope they will help you solve your problem.

[NexusSoftware]

You should check the value of the dataValue element you are sending to make sure is is correct. It needs to be dynamically populated with a real value. The default dataValue from the SDK example is not valid.