The closing step records Pos Sales to your accounting records, using a sales journal.This journal needs a debit and a credit default accounts: Customer account for the debit (for instance "411100 Cutomers" (this account number relates to French Chart of accounts)) AND Sales (Turnover account) for the credit. Set up these accounts if needed in the accounting menu.

Thank you for your help

I checked my chart of accounts and both accounts are well opened, the 411100 Customers for the debit and the 401100 Suppliers for the credit. I even checked if those accounts were opened as a view but unfortunatly not. Do you have another idea from where this error could come from ?

There must be a BUG, because if I create a new DB instance and instead of choosing a french chart of account I select the option custom chart of account, it works perfectly !!!!!