Error in _demux function

[ajoscha]

In function _demux of papi/plugin/base_classes/base_plugin.py:

It can happen that self._dplugin_info is None and then self._dplugin_info.get_subscribtions() is failing and the belonging plugin will not work anymore. It is as well not possible to correctly close PaPI. First solution is

       if self._dplugin_info is None:
           print("bug subscription demux")
           return None
       else:

and then to check in the calling function (in my case the function _work_process of papi/plugin/base_classes/base_ownProcess.py)

       data = self._demux(opt.data_source_id, opt.block_name, opt.data)
       if data is None:
            pass
       else:

this will not be the final solution but was a workaround in my case.

Note: _demux is also called in papi/gui/gui_event_processing.py, bit it seems like safety checks are done to prevent an error.