I want to run the idf file in python with eppy package, and the idf file is the one exported from OpenStudio with "Ideal Air Loads On". If I just want to see the load results and don't want to do any details about system, the ideal air load calculation seem to be a good solution. But when I ran the script like "idf1.run()", there're errors like below:

Program Version,EnergyPlus, Version 8.9.0-40101eaafd, YMD=2018.05.30 16:23,
   ** Severe  ** Line: 8112 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8140 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8168 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8196 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8224 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8252 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8280 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8308 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8336 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8364 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8392 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ** Severe  ** Line: 8420 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   **  Fatal  ** Errors occurred on processing input file. Preceding condition(s) cause termination.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=12
   ..... Last severe error=Line: 8420 You must run the ExpandObjects program for "HVACTemplate:Zone:IdealLoadsAirSystem"
   ************* Warning:  Node connection errors not checked - most system input has not been read (see previous warning).
   ************* Fatal error -- final processing.  Program exited before simulations began.  See previous error messages.
   ************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Sizing Error Summary. During Sizing: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Terminated--Fatal Error Detected. 0 Warning; 12 Severe Errors; Elapsed Time=00hr 00min  0.22sec

Is eppy run function not compatible with ideal air load calculation? Since the file could run successfully in EP-Launch.