It seems, that happens when warehouse is not selected in the shop, associated with sales order. 
Anyway, the traceback:

Traceback (most recent call last):
  File "widget\view\form_gtk\parser.pyo", line 117, in button_clicked
  File "rpc.pyo", line 170, in rpc_exec_auth
  File "rpc.pyo", line 113, in exec_auth
  File "rpc.pyo", line 119, in execute
  File "tiny_socket.pyo", line 81, in myreceive
tiny_socket.Myexception: ("'bool' object has no attribute 'id'", 'Traceback (most recent call last):\n  File "/usr/lib/python2.6/site-packages/openerp-server/netsvc.py", line 247, in dispatch\n    result = LocalService(service_name)(method, *params)\n  File "/usr/lib/python2.6/site-packages/openerp-server/netsvc.py", line 76, in __call__\n    return getattr(self, method)(*params)\n  File "/usr/lib/python2.6/site-packages/openerp-server/service/web_services.py", line 571, in exec_workflow\n    res = service.exec_workflow(db, uid, object, method, id)\n  File "/usr/lib/python2.6/site-packages/openerp-server/osv/osv.py", line 58, in wrapper\n    return f(self, dbname, *args, **kwargs)\n  File "/usr/lib/python2.6/site-packages/openerp-server/osv/osv.py", line 137, in exec_workflow\n    res = self.exec_workflow_cr(cr, uid, obj, method, *args)\n  File "/usr/lib/python2.6/site-packages/openerp-server/osv/osv.py", line 130, in exec_workflow_cr\n    return wf_service.trg_validate(uid, obj, args[0], method, cr)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/wkf_service.py", line 81, in trg_validate\n    res2 = instance.validate(cr, id, ident, signal)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/instance.py", line 50, in validate\n    workitem.process(cr, witem, ident, signal, force_running, stack=stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 62, in process\n    ok = _split_test(cr, workitem, activity[\'split_mode\'], ident, signal, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 175, in _split_test\n    _join_test(cr, t[0], t[1], ident, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 183, in _join_test\n    create(cr,[activity], inst_id, ident, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 42, in create\n    process(cr, res, ident, stack=stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 62, in process\n    ok = _split_test(cr, workitem, activity[\'split_mode\'], ident, signal, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 175, in _split_test\n    _join_test(cr, t[0], t[1], ident, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 183, in _join_test\n    create(cr,[activity], inst_id, ident, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 42, in create\n    process(cr, res, ident, stack=stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 62, in process\n    ok = _split_test(cr, workitem, activity[\'split_mode\'], ident, signal, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 175, in _split_test\n    _join_test(cr, t[0], t[1], ident, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 183, in _join_test\n    create(cr,[activity], inst_id, ident, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 42, in create\n    process(cr, res, ident, stack=stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 54, in process\n    result = _execute(cr, workitem, activity, ident, stack)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/workitem.py", line 108, in _execute\n    wkf_expr.execute(cr, ident, workitem, activity)\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/wkf_expr.py", line 68, in execute\n    return _eval_expr(cr, ident, workitem, activity[\'action\'])\n  File "/usr/lib/python2.6/site-packages/openerp-server/workflow/wkf_expr.py", line 58, in _eval_expr\n    ret = eval(line, env)\n  File "<string>", line 1, in <module>\n  File "/usr/lib/python2.6/site-packages/openerp-server/osv/orm.py", line 167, in <lambda>\n    return lambda *args, **argv: getattr(self._table, name)(self._cr, self._uid, [self._id], *args, **argv)\n  File "/usr/lib/python2.6/site-packages/openerp-server/addons/delivery/sale.py", line 42, in action_ship_create\n    result = super(sale_order, self).action_ship_create(cr, uid, ids, *args)\n  File "/usr/lib/python2.6/site-packages/openerp-server/addons/sale_journal/sale_journal_inherit.py", line 57, in action_ship_create\n    result = super(sale, self).action_ship_create(cr, uid, ids, *args)\n  File "/usr/lib/python2.6/site-packages/openerp-server/addons/sale/sale.py", line 565, in action_ship_create\n    output_id = order.shop_id.warehouse_id.lot_output_id.id\nAttributeError: \'bool\' object has no attribute \'id\'\n')

Revno for sales: 5.0.1.0
Revno for OpenERP Server: 5.0.11