Missing output variable

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I was using the add_output_variable measure to add the output variable Zone Ideal Loads Outdoor Air Mass Flow Rate. The Variable is present in the .rdd file:

Output:Variable,*,Zone Ideal Loads Heat Recovery Active Time,hourly; !- HVAC Sum [hr]
Output:Variable,*,Zone Ideal Loads Hybrid Ventilation Available Status,hourly; !- HVAC Average []
Output:Variable,*,Zone Ideal Loads Outdoor Air Mass Flow Rate,hourly; !- HVAC Average [kg/s]
Output:Variable,*,Zone Ideal Loads Outdoor Air Standard Density Volume Flow Rate,hourly; !- HVAC Average [m3/s]
Output:Variable,*,Zone Ideal Loads Supply Air Mass Flow Rate,hourly; !- HVAC Average [kg/s]

The request for output is present in the .OSM file:

OS:Output:Variable,
  {e9aa9dae-1405-4736-a8ef-7eb898377e41}, !- Handle
  Output Variable 5,                      !- Name
  *,                                      !- Key Value
  Zone Ideal Loads Outdoor Air Mass Flow Rate, !- Variable Name
  hourly;                                 !- Reporting Frequency

And in the .IDF file:

Output:Variable,
  *,                                      !- Key Value
  Zone Ideal Loads Outdoor Air Mass Flow Rate, !- Variable Name
  hourly;                                 !- Reporting Frequency

The eplusout.err file has no warning regarding that output variable. I can't find that variable in the eplusout.sql file. Anything I am doing wrong?