Error #47: Substring reference out of string after modifying cust inq panel settings

I went to customer inquiry, invoices tab, right clicked on it and went to panel settings.  Modified the tab by hiding two of the fields that were showing.

 

Now the system gives me the following error whenever I do cust inq and click on invoices tab with invoices on it.  Any ideas?

 

Error #47: Substring reference out of string

Program:  AR040TOC_CUSTOMER_UI.pvc  Line 61