On Success script broken

On Success script broken

I have an 'on success' script on my 'add customer' form which opens a new sale form preloaded with the customer data:

openUrl("#form: enter_sale?Customer=" + input.Full_Name,"same window" );

This script has always worked in the past but recently has become broken. After adding the customer, I get the following error: 

"There is no such component in ZohoCreator."

Has something changed, or is there an error in my script?

Thanks,
David