Dear Drees Far,

Using below code you will pass the value in pop-up

write this code inside your button function if your button type is object

raise osv.except_osv(_('Warning'), _('Your message %s.') % (fetching value))

For example:

first import the library

1.from openerp.tools.translate import _

2. Define your function like below.

def reverse_stock(self, cr, uid, ids, context=None):

    product_obj = self.pool.get('product.product')

    for data in self.browse(cr, uid, ids, context=None):

        for line_data in data.invoice_line:

            if line_data.quantity < line_data.product_id.qty_available:

                pass

            else:

                raise osv.except_osv(_('Warning'), _('Your total available products are %s.') % (line_data.product_id.qty_available))

    return True

Use the context attribute of the button tag. Example

<button name="method" string="clic me" type="object" context="{'key': 'value', 'field_key': field}" />