Print Shipping Label with Advanced Standard Template Gives Unexpected Error

Scenario

Print Shipping Label from Item Fulfillment using Standard Shipping Label PDF/HTML Template gives an error:"An unexpected error has occurred. Please click here to notify support and provide your contact information.".

In the Standard Shipping Label PDF/HTML Template, the following code condition on line 47 <#if label.refNumber !=0> expects to evaluate number from the PO # field (id:otherrefnum) on Sales Order. A non-number value on the PO # field displays this unexpected error. Change the condition in order to print Shipping Label with non-number value on the PO # field.

Solution

1. Navigate to Customization > Forms > Advanced PDF/HTML Templates
2. Standard Shipping Label PDF/HTML Template: Click Customize
3. Top Right Corner: Toggle Source Code
4. Line 47: Find <#if label.refNumber !=0> 
5. Replace it by <#if label.refNumber?has_content>
6. Click Save

Note: Make sure that the new custom template is marked Preferred.