Service Contracts; adding a function to an Independent Condition

Hi

We are implementing Electronic Renewals in Oracle Service Contracts.  The Independent Condition I was originally using was working OK. But I could not make it specific to contracts with a Renewal_Type of Electronic because in the expression Left Values there is no Renewal Type. I wrote a function to check this and tested it standalone, but when I added it to the Independent Condition, the contracts appear in the Date Assembler log but the Last Occurrence date is no longer updated on the Independent Condition.

What should the return value of the function be Boolean or another data type and value? Does anyone have an example Independent Condition function?