Stage movement error

[AdvancedImagingUTSW]

We are receiving this traceback after clicking the stage movement buttons a few times (any stage movement button will do). After we receive this callback, we can no longer move the stage. @annie-xd-wang, do you have any ideas as to what might cause this?

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\MicroscopyInnovation\.conda\envs\ASLM\lib\tkinter\__init__.py", line 1893, in __call__
    return self.func(*args)
  File "C:\Users\MicroscopyInnovation\.conda\envs\ASLM\lib\tkinter\__init__.py", line 815, in callit
    func(*args)
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\ASLM\src\controller\sub_controllers\stage_gui_controller.py", line 287, in <lambda>
    self.event_id[axis] = self.view.after(250, lambda: self.parent_controller.execute('stage', position_var.get(), axis))
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\ASLM\src\controller\aslm_controller.py", line 444, in execute
    self.move_stage(args=temp)
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\ASLM\src\controller\aslm_controller.py", line 626, in move_stage
    self.model.move_stage(args)
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\ASLM\src\model\concurrency\concurrency_tools.py", line 376, in attr
    return _get_response(self, True)
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\ASLM\src\model\concurrency\concurrency_tools.py", line 392, in _get_response
    resp, printed_output = object_in_subprocess._.parent_pipe.recv()
  File "C:\Users\MicroscopyInnovation\.conda\envs\ASLM\lib\multiprocessing\connection.py", line 259, in recv
    return _ForkingPickler.loads(buf.getbuffer())
TypeError: __init__() missing 1 required positional argument: 'value'

[annie-xd-wang]

I guess that the stage raises some errors, however, when unpickling the error message there is another error happened. I'm not quite sure, but I can help with debugging tomorrow.

[AdvancedImagingUTSW]

Working through the errors. MesoSPIM software throws it. Their proprietary software throws it. This is not our problem. Working with their engineers to try to solve it.

Traceback (most recent call last):
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\mesoSPIM-control\mesoSPIM\src\mesoSPIM_Stages.py", line 354, in report_position
    positions = self.pidevice.qPOS(self.pidevice.axes)
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\common\gcsbasecommands.py", line 643, in qPOS
    answer = self._msgs.read(cmdstr)
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\gcsmessages.py", line 171, in read
    self._checkerror()
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\gcsmessages.py", line 339, in _checkerror
    raise exc  # Raising NoneType while only classes or instances are allowed pylint: disable=E0702
pipython.pidevice.gcserror.GCSError: Unknown command (2)
Traceback (most recent call last):
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\mesoSPIM-control\mesoSPIM\src\mesoSPIM_Stages.py", line 354, in report_position
    positions = self.pidevice.qPOS(self.pidevice.axes)
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\common\gcsbasecommands.py", line 643, in qPOS
    answer = self._msgs.read(cmdstr)
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\gcsmessages.py", line 171, in read
    self._checkerror()
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\gcsmessages.py", line 339, in _checkerror
    raise exc  # Raising NoneType while only classes or instances are allowed pylint: disable=E0702
pipython.pidevice.gcserror.GCSError: Unknown command (2)
Traceback (most recent call last):
  File "C:\Users\MicroscopyInnovation\Documents\GitHub\mesoSPIM-control\mesoSPIM\src\mesoSPIM_Stages.py", line 354, in report_position
    positions = self.pidevice.qPOS(self.pidevice.axes)
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\common\gcsbasecommands.py", line 643, in qPOS
    answer = self._msgs.read(cmdstr)
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\gcsmessages.py", line 171, in read
    self._checkerror()
  File "C:\Users\MicroscopyInnovation\.conda\envs\py37\lib\site-packages\pipython\pidevice\gcsmessages.py", line 339, in _checkerror
    raise exc  # Raising NoneType while only classes or instances are allowed pylint: disable=E0702
pipython.pidevice.gcserror.GCSError: Unknown command (2)

[zacsimile]

There are instructions and example code for handling this type of error and resetting the error code on that stage axis here: https://pypi.org/project/PIPython/. We just have to catch a GCSError.

[AdvancedImagingUTSW]

Nice find!

from pipython import GCSDevice, GCSError, gcserror
with GCSDevice('C-884') as pidevice:
    try:
        pidevice.MOV('X', 1.23)
    except GCSError as exc:
        if exc == gcserror.E_1024_PI_MOTION_ERROR:
            print('There was a motion error, please check the mechanics.')
        else:
            raise

and

from pipython import GCSError, gcserror
raise GCSError(gcserror.E_1024_PI_MOTION_ERROR)
>>>GCSError: Motion error: position error too large, servo is switched off automatically (-1024)