Hi RWCTG,
Thank you so much for your post and welcome to the Community forum!
My apologies for the late response. We've identified that this issue may arise when the custom invoice form has invalid characters in its name. An example of an invalid character is found in the form name "ServiceInvoice#4". Please carefully review the names of your invoice forms, eliminate any invalid characters, and attempt the process again.
Valid characters include 0-9, A-Z, &, -, /, and '.
Invalid characters to avoid are "[ ] ! # $ % * ; = @ < > \ _ { } ^ ~ `".
Please do let me know how you go on this.
Regards,
Earl
