>>>You're right, I miscounted. Did you also pass 10 0s ?
>>
>>Yes, as a string
>
>Did you test SP by itself just in case - though it's so simple I don't see a reason why it would not work.

Just did and it seems to work. @NextNumber is "0000001045" just like I set it in the SP and the return value is 0 as expected. I will step into the C# code to see why it doesn't get back to there.
Tim