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["Fabien \(Open ERP\)" <fp@xxxxxxxxxxx>]

I suppose your issue is related to the mrp_operations module you
probably have installed ?

** Changed in: openobject-addons
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/700199

Title:
  [5.0/6.0] mrp_operations time stamp for barcode susceptible to
  mistakes

Status in OpenObject Addons Modules:
  Incomplete

Bug description:
  Quote from forum:
  "I use the barcode reader to introduce ORDER, WORKCENTER, OPERATION. Once I have done this, automatically a new register appears, with the initial date set, so, when I want to update the register with a new operation, the date is already set some time ago. " -Sergio

  i'm dealing with the same problem here. i've done some work to correct
  this but it's beyond my ability.

  i found out that deleting 'default' value from the module stops from
  stamping the time automatically and when i start the operation, it
  does write correct time (datetime.now() ) to workcenter line object.

  The problem is when you try to finish the operation with 'done' code.
  'calc_delay' function tries to take the values of
  mrp_operations.operation's date_start and date_finished and it returns
  error as below:

  Traceback (most recent call last): File
  "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
  /site-packages/openerp-server/netsvc.py", line 489, in dispatch result
  = ExportService.getService(service_name).dispatch(method, auth,
  params) File
  "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
  /site-packages/openerp-server/service/web_services.py", line 586, in
  dispatch res = fn(db, uid, *params) File
  "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
  /site-packages/openerp-server/osv/osv.py", line 57, in wrapper return
  f(self, dbname, *args, **kwargs) File
  "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
  /site-packages/openerp-server/osv/osv.py", line 140, in execute res =
  pool.execute_cr(cr, uid, obj, method, *args, **kw) File
  "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
  /site-packages/openerp-server/osv/osv.py", line 130, in execute_cr
  return getattr(object, method)(cr, uid, *args, **kw) File
  "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
  /site-packages/openerp-
  server/addons/mrp_operations/mrp_operations.py", line 533, in create
  delay=self.calc_delay(cr, uid, vals) File
  "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
  /site-packages/openerp-
  server/addons/mrp_operations/mrp_operations.py", line 430, in
  calc_delay a = datetime.strptime(time_lst[i-1],'%Y-%m-%d %H:%M:%S')
  TypeError: strptime() argument 1 must be string, not bool

  I'm trying to find the way so that the function takes the date_start
  time (it seems to be doing that already as found out from the
  traceback) and takes datetime.now() as the date_finished. This takes
  place both in 5.0 and 6.0.

  I understand this is not 'bug' per se, as it does that it's supposed to do. However, i think this is bad design for what it's supposed to do. 
  For my case, i''d like to make a dedicated client which accepts input thru barcode only and taking correct time is rather crucial in this operation (I'm pretty sure i'm not alone in this).