Index: src/main/groovy/com/lemans/builders/CommercialInvoiceBuilder.groovy
===================================================================
diff -u -r1164d860e869fa4099c484eb000c300192f58813 -r0872bae51f1b62e5d54fc5c22e1647a6849691bc
--- src/main/groovy/com/lemans/builders/CommercialInvoiceBuilder.groovy	(.../CommercialInvoiceBuilder.groovy)	(revision 1164d860e869fa4099c484eb000c300192f58813)
+++ src/main/groovy/com/lemans/builders/CommercialInvoiceBuilder.groovy	(.../CommercialInvoiceBuilder.groovy)	(revision 0872bae51f1b62e5d54fc5c22e1647a6849691bc)
@@ -272,7 +272,7 @@
             cell.setHorizontalAlignment(Element.ALIGN_RIGHT)
             invoiceTable.addCell(cell)
             //invoiceTable.addCell(new Phrase('PROFORMA', new Font(Font.FontFamily.HELVETICA, 8, Font.NORMAL)))
-            if (header.groupId) {
+            if (header?.groupId) {
                 cell = disableBorders(new PdfPCell().with {
                     addElement(new Paragraph("Invoice# / Order#", new Font(Font.FontFamily.HELVETICA, 8, Font.NORMAL)))
                     addElement(new Paragraph("${header?.salesOrderNumber} /", new Font(Font.FontFamily.HELVETICA, 8, Font.NORMAL)))