changes in sales_invoice.js file
diff --git a/accounts/doctype/sales_invoice/sales_invoice.js b/accounts/doctype/sales_invoice/sales_invoice.js
index 212ea58..be6ec3d 100644
--- a/accounts/doctype/sales_invoice/sales_invoice.js
+++ b/accounts/doctype/sales_invoice/sales_invoice.js
@@ -72,7 +72,7 @@
// Hide Fields
// ------------
cur_frm.cscript.hide_fields = function(doc, cdt, cdn) {
- par_flds = ['due_date', 'sales_order_main',
+ par_flds = ['project_name', 'due_date', 'sales_order_main',
'delivery_note_main', 'get_items', 'is_opening', 'conversion_rate',
'source', 'cancel_reason', 'total_advance', 'gross_profit',
'gross_profit_percent', 'get_advances_received',