I installed the HR Expense module to track general supplies such as office equipment (printer, papers, tools...etc). I applied myself as an employee in the HR module since I'm running my small business by myself with no employees. After I click the "Generate Accounting Entries" button, the state is moved to "Waiting Payment". This state just sits there forever. There is nowhere I can pay it. Nothing is shown in Customer Invoices or Supplier Invoices. There is NO manual with instruction on how this module works. This is for Odoo, not OpenERP 7.
Someone reported similar issue at https://www.odoo.com/forum/help-1/question/how-to-pay-hr-expense-50040, but it's not solved yet.
How can I make a payment in HR Expense module?
Without any receipt or invoice you will not able to make payment, If you want to make payment than make sure you also using account module as well. If you already installed account module than you either create supplier invoice for that expenses or create purchase receipt to make payment for that expenses.