Hello Guys,

Follow the steps below,

1) Create a new field (If not already existing) in CustTrans

2) Create the parm method for that field on CustVoucher class

3) Assign value to this parm method in SalesInvoiceJournalPost.postCustVend() method by using the custInvoiceJour buffer

4) Add the code for assigning the variable value(or the parm method value) in CustVoucher.initCustVendTrans() method

And now post an invoice and go to custTrans table to check the field value.