I'm just going to turn off edit checks, for now. When I get time, I might try to gather more diagnostic information.

(edit: I forgot to mention that I am using a CENTOS 7 Linux server running Apache and PHP 5.6)

function check_edit_conflicts($cartname='Items')
{
    global $Ajax, $no_check_edit_conflicts;

    if ((!isset($no_check_edit_conflicts) || $no_check_edit_conflicts==0) && get_post('cart_id') && $_POST['cart_id'] != $_SESSION[$cartname]->cart_id) {
        display_error(_('This edit session has been abandoned by opening sales document in another browser tab. You cannot edit more than one sales document at once.'));
        $Ajax->activate('_page_body');
        display_footer_exit();
    }
}

changed to:

function check_edit_conflicts($cartname='Items')
{
    global $Ajax;

    if (!empty($_SESSION[$cartname]->cart_id) && get_post('cart_id') && $_POST['cart_id'] != $_SESSION[$cartname]->cart_id) {
        display_error(_('This edit session has been abandoned by opening sales document in another browser tab. You cannot edit more than one sales document at once.'));
        $Ajax->activate('_page_body');
        display_footer_exit();
    }
}

Steps to check in a fresh FA v2.3 install on Windows XAMPP using en_US-demo.sql:
Sales => Direct Invoice => Customer => Ghostbusters
No error should crop up.

"This edit session has been abandoned by opening sales document in another browser tab. You cannot edit more than one sales document at once."

Only one user is logged in and only one invoice.

If I go the long route by creating an invoice, I am able to change the Barch without an issue.

Regards

Wynand

Sales > Customer Transaction Inquiry > click on pencil to edit some invoice > Process Invoice then hit back button and then Update

ed10

Joshua (sticmann) reports the problem:

Often on a sales invoice, I get this error without opening any other tabs:

"This edit session has been abandoned by opening sales document in another browser tab.
You cannot edit more than one sales document at once."

 
I see the function that is throwing the error, but I can't figure out how to make it stop.
 
We run a retail store, so we use the sales invoice frequently and this is becoming quite a nuisance.
 
I am running xampp on windows XP with Apache 2.2.21 and PHP 5.3.8

Thank you for any help,
 -Joshua
 

We have reproduced this error in Windows 7 with Apache 2.2.8 and PHP 5.2.6.

There are problems in Windows OS with session handling and we are not able to localize the problem in the code.

The check is done in /sales/includes/sales_ui.inc, function check_edit_conflicts($cartname='Items').

If this is a problem for you and you are sure that sales documents are never entered by more than one FA user at
the same time, you can eliminate this check by setting the variable $no_check_edit_conflicts=1 in config.php.
This is coming in release 2.3.13 that is about to ship.

We are working on this issue and if anybody can contribute with valuable information regarding this, you are
most welcome.

We want to solve this problem as soon as possible.

/Joe