Opening IDF generated by OS using EnergyPlus
I developed and run a model in OpenStudio and needed to access the IDF file.
I tried 2 approaches:
1. Double click the (in.IDF) file from ...run\2-ModelToIdf-0.
I got this first warning 
Continued but the results has the following errors
"Program Version,EnergyPlus-Windows-64 8.1.0.009, YMD=2015.08.03 10:12,IDD_Version 8.1.0.009
*** IDF Context for following error/warning message:
*** Note -- lines truncated at 300 characters, if necessary...
*** 4779 Sizing:System,
*** indicated Name=Packaged Rooftop Heat Pump
*** Only last 10 lines before error line shown.....
*** 4791 Yes, !- 100% Outdoor Air in Cooling
*** 4792 Yes, !- 100% Outdoor Air in Heating
*** 4793 0.0085, !- Central Cooling Design Supply Air Humidity Ratio {kgWater/kgDryAir}
*** 4794 0.008, !- Central Heating Design Supply Air Humidity Ratio {kgWater/kgDryAir}
*** 4795 DesignDay, !- Cooling Design Air Flow Method
*** 4796 0, !- Cooling Design Air Flow Rate {m3/s}
*** 4797 , !- Supply Air Flow Rate Per Floor Area During Cooling Operation {m3/s-m2}
*** 4798 , !- Fraction of Autosized Design Cooling Supply Air Flow Rate
*** 4799 , !- Design Supply Air Flow Rate Per Unit Cooling Capacity {m3/s-W}
*** 4800 DesignDay, !- Heating Design Air Flow Method
* Severe * IP: IDF line~4800 Invalid Number in Numeric Field#13 (Zone Maximum Outdoor Air Fraction), value=DESIGNDAY, in SIZING:SYSTEM=PACKAGED ROOFTOP HEAT PUMP
* Warning * IP: Note -- Some missing fields have been filled with defaults. See the audit output file for details.
* Severe * IP: Possible incorrect IDD File
* ~~~ * IDD Version:"IDD_Version 8.1.0.009"
* ~~~ * Version in IDF="8.2" not the same as expected="8.1.0"
* ~~~ * Possible Invalid Numerics or other problems
* Fatal * IP: Errors occurred on processing IDF file. Preceding condition(s) cause termination.
...Summary of Errors that led to program termination:
..... Reference severe error count=2
..... Last severe error=IP: Possible incorrect IDD File
*** 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. 1 Warning; 2 Severe Errors; Elapsed Time=00hr 00min 1.35sec"
- Following the path C:\Program Files\OpenStudio 1.7.0\share\openstudio\EnergyPlusV8-2-0 to open EnergyPlus Version 8.2 and call the said file (in.IDF) but got this error
.
Any idea?
For the first approach it looks like it failed because the default application for .idf files on your computer is EnergyPlus 8.1, but the file you are using from OpenStudio is an 8.2 EnergyPlus file. The message seems a bit, maybe EnergyPluse just knows the version number isn't what is expected, and it says it is an older version when in reality it is a too new of an IDF.
The second approach where you see the approach is definitively an issue. At what point did EP Launch Crash? were you trying to open the IDF in IDF Editor or trying to simulate?
If you send the file to OpenStudio@NREL.gov we can try to duplicate the issue. Please let us know if you are using 32 or 64bit version of EnergyPlus.
I share the same view about the first issue with David. For the second problem it seems the problem comes when the program accesses the corresponding object for the following line: Severe * IP: IDF line~4800 Invalid Number in Numeric Field#13 (Zone Maximum Outdoor Air Fraction), value=DESIGNDAY, in SIZING:SYSTEM=PACKAGED ROOFTOP HEAT PUMP You can get further information about errors from the err file that exists here: <your_os_simulation_folder>\Built_stp5\run\6-UserScript-0. If I were in your place I would delete the whole object that causes this error and see whether the simulation runs