retrieving duals results in a Key error

[sriharid]

GridPath version: v0.16.0

Running the example scenario test_startup_shutdown_rates using CPLEX results in the following error. Is there a way to turn off extracting duals for integer variables?

CPLEX> Incumbent solution written to file 'C:\Users\Srihari\AppData\Local\Temp\tmp9572u782.cplex.sol'.
CPLEX> Saving results...
...solver termination condition: optimal.
...exporting CSV results
ERROR:root:"Component with id '2671559455552': GenCommitBin_Min_Down_Time_Constraint[Gas_CCGT,20200101]"
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\envs\gp-0.16.0\lib\site-packages\pyomo\common\collections\component_map.py", line 68, in __getitem__
    return self._dict[id(obj)][1]
KeyError: 2671559455552

This error does not show up when using CBC.