cam6_4_147: Made ERI test check for Gregorian+spinup compset incompatibility

cime_config/buildnml

@@ -47,6 +47,23 @@ def buildnml(case, caseroot, compname):
     RUN_REFDATE         = case.get_value("RUN_REFDATE")
     RUN_REFTOD          = case.get_value("RUN_REFTOD")
     COMP_INTERFACE      = case.get_value("COMP_INTERFACE")
+    CALENDAR            = case.get_value("CALENDAR")
+    COMPSET             = case.get_value("COMPSET")
+
+# The Gregorian calendar currently can't be used with spinup compsets
+# because CAM's stream-handling code can't handle a request for data
+# for Feb 29 (possibly specified in a leapday testmod) from a non-leap-year
+# in the stream(s) data (specified in a use_case, e.g. 1850_cam_lt.xml).
+# This limitation can be removed when CAM's stream-handling is switched to
+# using CDEPS, which appears to handle this situation. (See discussion in
+# https://github.com/ESCOMP/CAM/issues/1447 for details.)
+    if CALENDAR.startswith("GREGORIAN"):
+        spinup_po = re.compile('\d{4}')
+        spinup = spinup_po.match(COMPSET)
+        expect(spinup == None,
+            "Gregorian calendar (modifier _cG) cannot be used with spinup compset \n  {}".format(COMPSET)
+        )
+
 
     testsrc = os.path.join(srcroot, "components", "cam")
     if os.path.exists(testsrc):

cime_config/testdefs/testlist_cam.xml

@@ -1079,7 +1079,7 @@
       <option name="wallclock">00:20:00</option>
     </options>
   </test>
-  <test compset="QPWmaC6" grid="f45_f45_mg37" name="ERP_Ln9_P24x2" testmods="cam/outfrq9s_mee_fluxes" supported="false">
+  <test compset="FWmaHIST" grid="f10_f10_mg37" name="SMS_D_Ln9" testmods="cam/outfrq9s_mee_fluxes" supported="false">
     <machines>
       <machine name="izumi" compiler="gnu" category="aux_cam"/>
     </machines>

cime_config/testdefs/testmods_dirs/cam/outfrq9s_leapday/shell_commands

@@ -3,4 +3,4 @@ if [ "$driver" = "nuopc" ]; then
   ./xmlchange ROF_NCPL=\$ATM_NCPL
   ./xmlchange GLC_NCPL=\$ATM_NCPL
 fi
-./xmlchange RUN_STARTDATE=2012-02-29
+./xmlchange RUN_STARTDATE=2008-02-29

cime_config/testdefs/testmods_dirs/cam/outfrq9s_leapday/user_nl_clm

@@ -24,4 +24,5 @@
 hist_nhtfrq = 9
 hist_mfilt  = 1
 hist_ndens  = 1
-
+check_finidat_year_consistency = .false.
+for_testing_allow_non_annual_changes = .true.

cime_config/testdefs/testmods_dirs/cam/outfrq9s_leapday/user_nl_mosart

@@ -0,0 +1,8 @@
+!----------------------------------------------------------------------------------
+! Users should add all user specific namelist changes below in the form of 
+! namelist_var = new_namelist_value 
+! NOTE: namelist variable delt_mosart (the time-step) CAN ONLY be changed by modifying the value
+!       of the xml variable ROF_NCPL in env_run.xml
+!----------------------------------------------------------------------------------
+nhtfrq = -24
+

doc/ChangeLog

@@ -1,3 +1,84 @@
+
+===============================================================
+
+Tag name: cam6_4_147
+Originator(s): kdraeder, cacraigucar
+Date: Jan 28, 2026
+One-line Summary: Made ERI test check for Gregorian+spinup compset incompatibility
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1473
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+  - ERI test; consistency of compset and calendar: https://github.com/ESCOMP/CAM/issues/1447
+
+Describe any changes made to build system:
+  - Now checks that a user is not using the gregorian calendar with a spinup compset since the stream handling
+    has issues with leap days
+
+Describe any changes made to the namelist: N/A
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: cacraigucar
+
+List all files eliminated: N/A
+
+List all files added and what they do:
+A       cime_config/testdefs/testmods_dirs/cam/outfrq9s_leapday/user_nl_mosart
+          - add output frequency for mosart
+
+List all existing files that have been modified, and describe the changes:
+M       cime_config/buildnml
+          - add check to prevent gregorian calendar to be used with spinup compsets
+
+M       cime_config/testdefs/testlist_cam.xml
+          - change test which was using gregorian calendaro with a spinup compset to a working configuration
+
+M       cime_config/testdefs/testmods_dirs/cam/outfrq9s_leapday/shell_commands
+M       cime_config/testdefs/testmods_dirs/cam/outfrq9s_leapday/user_nl_clm
+          - mods  to better test leapday
+
+If there were any failures reported from running test_driver.sh on any test
+platform, and checkin with these failures has been OK'd by the gatekeeper,
+then copy the lines from the td.*.status files for the failed tests to the
+appropriate machine below.  All failed tests must be justified.
+
+derecho/intel/aux_cam:
+  ERI_D_Ln18.ne16pg3_ne16pg3_mt232.FHIST_C4.derecho_intel.cam-outfrq3s_eri (Overall: FAIL) details:
+   - pre-existing failure
+   - ERI test discovered a bug in CICE:  See: https://github.com/ESCOMP/CESM_CICE/issues/34
+
+    SMS_D_Ln9.f09_f09_mg17.FCts2nudged.derecho_intel.cam-outfrq9s_leapday (Overall: DIFF) details:
+      FAIL SMS_D_Ln9.f09_f09_mg17.FCts2nudged.derecho_intel.cam-outfrq9s_leapday NLCOMP
+      FAIL SMS_D_Ln9.f09_f09_mg17.FCts2nudged.derecho_intel.cam-outfrq9s_leapday BASELINE /glade/campaign/cesm/community/amwg/cam_base
+         - Changed namelist settings for the leapday test
+
+derecho/nvhpc/aux_cam:
+  ERS_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_LTso.derecho_nvhpc.cam-outfrq9s_gpu_default (Overall: FAIL) details:
+   - pre-existing failure -- exceeds wallclock time limit
+       NOTE: Jian has determined this is due to changes on derecho with the the last upgrade.
+        He has reported the issue to CISL.  Note cam6_4_128 is the last CAM tag with
+	baselines to use for comparison but answer changes are expected starting with
+	cam6_4_130.
+
+    End of cesm.log file:
+deg0049.hsn.de.hpc.ucar.edu 0: calcsize j,iq,jac, lsfrm,lstoo  2  5  2  19  20
+deg0049.hsn.de.hpc.ucar.edu 1:  Opened file
+deg0049.hsn.de.hpc.ucar.edu 1:  ERS_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_LTso.derecho_nvhpc.cam-outfrq9s_gpu_default.G.aux_cam_nvhpc_20260123064354.cam.r.1979-01-01-09000.nc
+deg0049.hsn.de.hpc.ucar.edu 1:   to write          316
+deg0051.hsn.de.hpc.ucar.edu: rank 64 died from signal 15
+
+
+izumi/nag/aux_cam: all BFB
+
+izumi/gnu/aux_cam:
+  SMS_D_Ln9.f10_f10_mg37.FWmaHIST.izumi_gnu.cam-outfrq9s_mee_fluxes (Overall: DIFF) details:
+      FAIL SMS_D_Ln9.f10_f10_mg37.FWmaHIST.izumi_gnu.cam-outfrq9s_mee_fluxes NLCOMP
+      FAIL SMS_D_Ln9.f10_f10_mg37.FWmaHIST.izumi_gnu.cam-outfrq9s_mee_fluxes BASELINE
+         - Introduced new test
+
+===============================================================
 ===============================================================
 
 Tag name: cam6_4_146