EnergyPlus "Field is required but was blank"

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Can anyone help me decipher what the following eplusout.err error codes mean? It's a very basic 6 room model with a few windows, nothing fancy.

Program Version,EnergyPlus, Version 8.2.0-8397c2e30b, YMD=2015.05.27 15:45,IDD_Version 8.2.0
   ************* IDF Context for following error/warning message:
   ************* Note -- lines truncated at 300 characters, if necessary...
   *************   2979 BuildingSurface:Detailed,
   ************* indicated Name=Surface 371
   ************* Only last 3 lines before error line shown.....
   *************   2980   Surface 371,                            !- Name
   *************   2981   Roof,                                   !- Surface Type
   *************   2982   ,                                       !- Construction Name

** Severe  ** IP: IDF line~2982 Error detected in Object=BUILDINGSURFACE:DETAILED, name=SURFACE 371
   **   ~~~   ** Field [Construction Name] is required but was blank
   ************* IDF Context for following error/warning message:
   ************* Note -- lines truncated at 300 characters, if necessary...
   *************   2979 BuildingSurface:Detailed,
   ************* indicated Name=Surface 371
   ************* Only last 4 lines before error line shown.....
   *************   2980   Surface 371,                            !- Name
   *************   2981   Roof,                                   !- Surface Type
   *************   2982   ,                                       !- Construction Name
   *************   2983   ,                                       !- Zone Name

   ** Severe  ** IP: IDF line~2983 Error detected in Object=BUILDINGSURFACE:DETAILED, name=SURFACE 371
   **   ~~~   ** Field [Zone Name] is required but was blank
   ************* IDF Context for following error/warning message:
   ************* Note -- lines truncated at 300 characters, if necessary...
   *************   3003 BuildingSurface:Detailed,
   ************* indicated Name=Surface 694
   ************* Only last 3 lines before error line shown.....
   *************   3004   Surface 694,                            !- Name
   *************   3005   Roof,                                   !- Surface Type
   *************   3006   ,                                       !- Construction Name

   ** Severe  ** IP: IDF line~3006 Error detected in Object=BUILDINGSURFACE:DETAILED, name=SURFACE 694
   **   ~~~   ** Field [Construction Name] is required but was blank
   ************* IDF Context for following error/warning message:
   ************* Note -- lines truncated at 300 characters, if necessary...
   *************   3003 BuildingSurface:Detailed,
   ************* indicated Name=Surface 694
   ************* Only last 4 lines before error line shown.....
   *************   3004   Surface 694,                            !- Name
   *************   3005   Roof,                                   !- Surface Type
   *************   3006   ,                                       !- Construction Name
   *************   3007   ,                                       !- Zone Name

   ** Severe  ** IP: IDF line~3007 Error detected in Object=BUILDINGSURFACE:DETAILED, name=SURFACE 694
   **   ~~~   ** Field [Zone Name] is required but was blank
   ** Warning ** IP: Note -- Some missing fields have been filled with defaults. See the audit output file for details.

   ** Severe  ** IP: Blank "required" fields found in input

   ** Severe  ** IP: Out of "range" values and/or blank required fields found in input

   **  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=6
   ..... Last severe error=IP: Out of "range" values and/or blank required fields found in input
   ************* 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; 6 Severe Errors; Elapsed Time=00hr 00min  1.00sec