timeout error for self.epics_pvs['FPCapture'].put('Done')

[nikitinvv]

@MarkRivers @decarlof In self.epics_pvs['FPCapture'].put('Done') called in

tomoscan/tomoscan/tomoscan.py

Line 791 in d0ce3ce

self.epics_pvs['FPCapture'].put('Done')

I have a timeout error in the streaming mode where capturing is not happening by default. I.e. self.epics_pvs['FPCapture'].put('Done') fails whenever self.epics_pvs['FPCapture']=='Done'.

The error is as follows:

Traceback (most recent call last):
  File "_ctypes/callbacks.c", line 237, in 'calling callback function'
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/ca.py", line 709, in _onMonitorEvent
    args.usr(value=value, **kwds)
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/pv.py", line 767, in __on_changes
    self.run_callbacks()
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/pv.py", line 48, in wrapped
    return func(self, *args, **kwargs)
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/pv.py", line 778, in run_callbacks
    self.run_callback(index)
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/pv.py", line 48, in wrapped
    return func(self, *args, **kwargs)
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/pv.py", line 801, in run_callback
    fcn(**kwd)
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/tomoscan-0.1-py3.8.egg/tomoscan/tomoscan.py", line 288, in pv_callback
    self.abort_scan()
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/tomoscan-0.1-py3.8.egg/tomoscan/tomoscan.py", line 786, in abort_scan
    self.epics_pvs['FPCapture'].put('Done') # VN: for put('Done') I have a timeout error in the streaming mode where capture is not happening by default
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/pv.py", line 48, in wrapped
    return func(self, *args, **kwargs)
  File "/local/user2bmb/conda/anaconda/lib/python3.8/site-packages/epics/pv.py", line 636, in put
    if value in self._args['enum_strs']:
TypeError: argument of type 'NoneType' is not iterable
2021-08-09 21:56:39,890 - pv_callback pvName=2bma:TomoScanStream:AbortScan, value=0, char_value=No

However, it works fine if instead of put('Done') I set put(0). Why this happens?

[MarkRivers]

I cannot explain that. Writing 'Done' and writing 0 should be equivalent. I just tested and both worked for me, but I was not testing with tomoscan in stream mode.