diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0a17d9feea5..96cfc44e83ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -49,6 +49,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Update `Findudunits.cmake` to link with libdl and look for the `udunits2.xml` file (as some MAPL tests require it)
 - Modified `ESMF_GridComp` creation in `GenericGridComp` to use `ESMF_CONTEXT_PARENT_VM` by default.
 - Changed `get_fptr_shape` in `FieldCondensedArray*.F90`
+- Change name of ExtensionAction%run to ExtensionAction%update in the abstract type and derived types.
+- Add invalid method to ExtensionAction with a no-op implementation in the abstract type
 
 ### Fixed
 
@@ -63,11 +65,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+
 - Allow update offsets of ±timestep in ExtData2G
 
 ### Changed
 
 - Update ESMF version for Baselibs to match that of Spack for consistency
+- Update `components.yaml`
+  - ESMA_env v4.32.0
+    - Baselibs 7.27.0
+      - ESMF 8.7.0
+      - curl 8.10.1
+      - NCO 5.2.8
+      - CDO 2.4.4
+      - GSL 2.8
+      - jpeg 9f
+      - Various build fixes
+  - ESMA_cmake v3.52.0
+    - Fixes for using MAPL as a library in spack builds of GEOSgcm
+    - Various backports from v4
 
 ### Fixed
 
@@ -77,6 +93,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Deprecated
 
+## [2.50.1] - 2024-10-18
+
+### Fixed
+
+- Fixed unitialized variable bug in ExtData exposed by gfortran
+
 ## [2.50.0] - 2024-10-10
 
 ### Added
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 918dd9799e79..3e6fd5e8bce3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ endif ()
 
 project (
   MAPL
-  VERSION 2.50.0
+  VERSION 2.50.1
   LANGUAGES Fortran CXX C)  # Note - CXX is required for ESMF
 
 # Set the possible values of build type for cmake-gui
diff --git a/components.yaml b/components.yaml
index 4360ab32a56f..271f302b4f9d 100644
--- a/components.yaml
+++ b/components.yaml
@@ -5,13 +5,13 @@ MAPL:
 ESMA_env:
   local: ./ESMA_env
   remote: ../ESMA_env.git
-  tag: v4.30.1
+  tag: v4.31.0
   develop: main
 
 ESMA_cmake:
   local: ./ESMA_cmake
   remote: ../ESMA_cmake.git
-  tag: v3.51.0
+  tag: v3.52.0
   develop: develop
 
 ecbuild:
diff --git a/generic3g/actions/ConvertUnitsAction.F90 b/generic3g/actions/ConvertUnitsAction.F90
index f32b19fd8517..ea29214441ef 100644
--- a/generic3g/actions/ConvertUnitsAction.F90
+++ b/generic3g/actions/ConvertUnitsAction.F90
@@ -19,7 +19,7 @@ module mapl3g_ConvertUnitsAction
       character(:), allocatable :: src_units, dst_units
    contains
       procedure :: initialize
-      procedure :: run
+      procedure :: update
    end type ConvertUnitsAction
 
 
@@ -59,7 +59,7 @@ subroutine initialize(this, importState, exportState, clock, rc)
    end subroutine initialize
 
       
-   subroutine run(this, importState, exportState, clock, rc)
+   subroutine update(this, importState, exportState, clock, rc)
       use esmf
       class(ConvertUnitsAction), intent(inout) :: this
       type(ESMF_State)      :: importState
@@ -95,6 +95,6 @@ subroutine run(this, importState, exportState, clock, rc)
 
       _FAIL('unsupported typekind')
       _UNUSED_DUMMY(clock)
-   end subroutine run
+   end subroutine update
    
 end module mapl3g_ConvertUnitsAction
diff --git a/generic3g/actions/CopyAction.F90 b/generic3g/actions/CopyAction.F90
index f84befae6cac..a498bab13cbd 100644
--- a/generic3g/actions/CopyAction.F90
+++ b/generic3g/actions/CopyAction.F90
@@ -16,7 +16,7 @@ module mapl3g_CopyAction
       type(ESMF_Field) :: f_in, f_out
    contains
       procedure :: initialize
-      procedure :: run
+      procedure :: update
    end type CopyAction
 
    interface CopyAction
@@ -65,7 +65,7 @@ subroutine initialize(this, importState, exportState, clock, rc)
       _UNUSED_DUMMY(clock)
    end subroutine initialize
 
-   subroutine run(this, importState, exportState, clock, rc)
+   subroutine update(this, importState, exportState, clock, rc)
       use esmf
       class(CopyAction), intent(inout) :: this
       type(ESMF_State)      :: importState
@@ -82,7 +82,7 @@ subroutine run(this, importState, exportState, clock, rc)
       call FieldCopy(f_in, f_out, _RC)
 
       _RETURN(_SUCCESS)
-   end subroutine run
+   end subroutine update
 
 
 end module mapl3g_CopyAction
diff --git a/generic3g/actions/ExtensionAction.F90 b/generic3g/actions/ExtensionAction.F90
index b2a7ed6cda4c..3c52fa3d4d76 100644
--- a/generic3g/actions/ExtensionAction.F90
+++ b/generic3g/actions/ExtensionAction.F90
@@ -10,7 +10,8 @@ module mapl3g_ExtensionAction
    type, abstract :: ExtensionAction
    contains
       procedure(I_run), deferred :: initialize
-      procedure(I_run), deferred :: run
+      procedure(I_run), deferred :: update
+      procedure :: invalidate
    end type ExtensionAction
 
 
@@ -26,4 +27,22 @@ subroutine I_run(this, importState, exportState, clock, rc)
       end subroutine I_run
    end interface
 
+contains
+
+   ! This is a default no-op implementation of invalidate.
+   ! Types derived from ExtensionAction should overload it
+   ! as needed.
+   subroutine invalidate(this, importState, exportState, clock, rc)
+      use ESMF
+      class(ExtensionAction), intent(inout) :: this
+      type(ESMF_State) :: importState
+      type(ESMF_State) :: exportState
+      type(ESMF_Clock) :: clock
+      integer, optional, intent(out) :: rc
+      _UNUSED_DUMMY(this)
+      _UNUSED_DUMMY(importState)
+      _UNUSED_DUMMY(exportState)
+      _UNUSED_DUMMY(clock)
+   end subroutine invalidate
+
 end module mapl3g_ExtensionAction
diff --git a/generic3g/actions/NullAction.F90 b/generic3g/actions/NullAction.F90
index 5eb975e75fba..8ddd5de55eb8 100644
--- a/generic3g/actions/NullAction.F90
+++ b/generic3g/actions/NullAction.F90
@@ -15,7 +15,7 @@ module mapl3g_NullAction
    type, extends(ExtensionAction) :: NullAction
    contains
       procedure :: initialize
-      procedure :: run
+      procedure :: update
    end type NullAction
 
    interface NullAction
@@ -42,7 +42,7 @@ subroutine initialize(this, importState, exportState, clock, rc)
       _UNUSED_DUMMY(clock)
    end subroutine initialize
 
-   subroutine run(this, importState, exportState, clock, rc)
+   subroutine update(this, importState, exportState, clock, rc)
       use esmf
       class(NullAction), intent(inout) :: this
       type(ESMF_State)      :: importState
@@ -54,6 +54,6 @@ subroutine run(this, importState, exportState, clock, rc)
       _UNUSED_DUMMY(importState)
       _UNUSED_DUMMY(exportState)
       _UNUSED_DUMMY(clock)
-  end subroutine run
+  end subroutine update
 
 end module mapl3g_NullAction
diff --git a/generic3g/actions/RegridAction.F90 b/generic3g/actions/RegridAction.F90
index 031f5bf0bb2b..5eb024455345 100644
--- a/generic3g/actions/RegridAction.F90
+++ b/generic3g/actions/RegridAction.F90
@@ -20,7 +20,7 @@ module mapl3g_RegridAction
       class(Regridder), pointer :: regrdr
    contains
       procedure :: initialize
-      procedure :: run
+      procedure :: update
    end type ScalarRegridAction
 
    interface RegridAction
@@ -67,7 +67,7 @@ subroutine initialize(this, importState, exportState, clock, rc)
    end subroutine initialize
 
 
-   subroutine run(this, importState, exportState, clock, rc)
+   subroutine update(this, importState, exportState, clock, rc)
       class(ScalarRegridAction), intent(inout) :: this
       type(ESMF_State)      :: importState
       type(ESMF_State)      :: exportState
@@ -84,6 +84,6 @@ subroutine run(this, importState, exportState, clock, rc)
 
       _RETURN(_SUCCESS)
       _UNUSED_DUMMY(clock)
-   end subroutine run
+   end subroutine update
 
 end module mapl3g_RegridAction
diff --git a/generic3g/actions/TimeInterpolateAction.F90 b/generic3g/actions/TimeInterpolateAction.F90
index fd9685f69ed1..c34222ca5fe4 100644
--- a/generic3g/actions/TimeInterpolateAction.F90
+++ b/generic3g/actions/TimeInterpolateAction.F90
@@ -17,7 +17,7 @@ module mapl3g_TimeInterpolateAction
    type, extends(ExtensionAction) :: TimeInterpolateAction
    contains
       procedure :: initialize
-      procedure :: run
+      procedure :: update
    end type TimeInterpolateAction
 
    interface TimeInterpolateAction
@@ -42,7 +42,7 @@ subroutine initialize(this, importState, exportState, clock, rc)
       _RETURN(_SUCCESS)
    end subroutine initialize
 
-   subroutine run(this, importState, exportState, clock, rc)
+   subroutine update(this, importState, exportState, clock, rc)
       class(TimeInterpolateAction), intent(inout) :: this
       type(ESMF_State)      :: importState
       type(ESMF_State)      :: exportState
@@ -80,7 +80,7 @@ subroutine run(this, importState, exportState, clock, rc)
 
       _RETURN(_SUCCESS)
       _UNUSED_DUMMY(clock)
-   end subroutine run
+   end subroutine update
 
 
    subroutine run_r4(bundle_in, field_out, rc)
diff --git a/generic3g/actions/VerticalRegridAction.F90 b/generic3g/actions/VerticalRegridAction.F90
index 3eb1ed880444..ff8dcf2d5149 100644
--- a/generic3g/actions/VerticalRegridAction.F90
+++ b/generic3g/actions/VerticalRegridAction.F90
@@ -25,7 +25,7 @@ module mapl3g_VerticalRegridAction
       type(VerticalRegridMethod) :: method = VERTICAL_REGRID_UNKNOWN
    contains
       procedure :: initialize
-      procedure :: run
+      procedure :: update
    end type VerticalRegridAction
 
    interface VerticalRegridAction
@@ -72,7 +72,7 @@ subroutine initialize(this, importState, exportState, clock, rc)
       _RETURN(_SUCCESS)
    end subroutine initialize
 
-   subroutine run(this, importState, exportState, clock, rc)
+   subroutine update(this, importState, exportState, clock, rc)
       use esmf
       class(VerticalRegridAction), intent(inout) :: this
       type(ESMF_State)      :: importState
@@ -117,6 +117,6 @@ subroutine run(this, importState, exportState, clock, rc)
       end do
 
       _RETURN(_SUCCESS)
-   end subroutine run
+   end subroutine update
 
 end module mapl3g_VerticalRegridAction
diff --git a/generic3g/couplers/CouplerMetaComponent.F90 b/generic3g/couplers/CouplerMetaComponent.F90
index 9ba3cd657710..2d4c6c812670 100644
--- a/generic3g/couplers/CouplerMetaComponent.F90
+++ b/generic3g/couplers/CouplerMetaComponent.F90
@@ -136,7 +136,7 @@ recursive subroutine update(this, importState, exportState, clock, rc)
 !#      call this%propagate_attributes(_RC)
       call this%update_sources(_RC)
       
-      call this%action%run(importState, exportState, clock, _RC)
+      call this%action%update(importState, exportState, clock, _RC)
       call this%set_up_to_date()
 
       _RETURN(_SUCCESS)
diff --git a/generic3g/tests/MockItemSpec.F90 b/generic3g/tests/MockItemSpec.F90
index b3d865591023..381ddc6229bd 100644
--- a/generic3g/tests/MockItemSpec.F90
+++ b/generic3g/tests/MockItemSpec.F90
@@ -41,7 +41,7 @@ module MockItemSpecMod
       character(:), allocatable :: details
    contains
       procedure :: initialize
-      procedure :: run
+      procedure :: update
    end type MockAction
 
    interface MockItemSpec
@@ -215,7 +215,7 @@ subroutine initialize(this, importState, exportState, clock, rc)
       _FAIL('This procedure should not be called.')
    end subroutine initialize
 
-   subroutine run(this, importState, exportState, clock, rc)
+   subroutine update(this, importState, exportState, clock, rc)
       use esmf
       class(MockAction), intent(inout) :: this
       type(ESMF_State)      :: importState
@@ -223,7 +223,7 @@ subroutine run(this, importState, exportState, clock, rc)
       type(ESMF_Clock)      :: clock      
       integer, optional, intent(out) :: rc
       _FAIL('This procedure should not be called.')
-   end subroutine run
+   end subroutine update
    
    function make_adapters(this, goal_spec, rc) result(adapters)
       type(StateItemAdapterWrapper), allocatable :: adapters(:)
diff --git a/generic3g/tests/Test_TimeInterpolateAction.pf b/generic3g/tests/Test_TimeInterpolateAction.pf
index 99f34ab702d2..ab703e5faceb 100644
--- a/generic3g/tests/Test_TimeInterpolateAction.pf
+++ b/generic3g/tests/Test_TimeInterpolateAction.pf
@@ -42,7 +42,7 @@ contains
       call ESMF_FieldEmptyComplete(f, typekind=ESMF_TYPEKIND_R4, _RC)
       call ESMF_StateAdd(exportState, [f], _RC)
 
-      call action%run(importState, exportState, clock, _RC)
+      call action%update(importState, exportState, clock, _RC)
 
       call assign_fptr(f, x, _RC)
       @assert_that(x, every_item(is(equal_to(7.))))
@@ -96,7 +96,7 @@ contains
       call ESMF_FieldEmptyComplete(f, typekind=ESMF_TYPEKIND_R4, _RC)
       call ESMF_StateAdd(exportState, [f], _RC)
 
-      call action%run(importState, exportState, clock, _RC)
+      call action%update(importState, exportState, clock, _RC)
 
       call assign_fptr(f, x, _RC)
       @assert_that(x, every_item(is(equal_to(4.))))
@@ -155,7 +155,7 @@ contains
       call ESMF_FieldEmptyComplete(f, typekind=ESMF_TYPEKIND_R4, _RC)
       call ESMF_StateAdd(exportState, [f], _RC)
 
-      call action%run(importState, exportState, clock, _RC)
+      call action%update(importState, exportState, clock, _RC)
 
       call assign_fptr(f, x, _RC)
       @assert_that(x(1), is(equal_to(4.)))
diff --git a/gridcomps/ExtData2G/ExtDataBracket.F90 b/gridcomps/ExtData2G/ExtDataBracket.F90
index 09ad0b08b2d5..c3d0a1023571 100644
--- a/gridcomps/ExtData2G/ExtDataBracket.F90
+++ b/gridcomps/ExtData2G/ExtDataBracket.F90
@@ -21,8 +21,8 @@ module MAPL_ExtDataBracket
       real             :: offset = 0.0
       logical          :: disable_interpolation = .false.
       logical          :: intermittent_disable = .false.
-      logical          :: new_file_right
-      logical          :: new_file_left
+      logical          :: new_file_right = .false.
+      logical          :: new_file_left = .false.
       logical          :: exact = .false.
       contains
          procedure :: interpolate_to_time
diff --git a/gridcomps/ExtData2G/ExtDataOldTypesCreator.F90 b/gridcomps/ExtData2G/ExtDataOldTypesCreator.F90
index 0cff22ab1ce7..196ae280e03d 100644
--- a/gridcomps/ExtData2G/ExtDataOldTypesCreator.F90
+++ b/gridcomps/ExtData2G/ExtDataOldTypesCreator.F90
@@ -116,6 +116,7 @@ subroutine fillin_primary(this,item_name,base_name,primary_item,time,clock,unusa
          primary_item%cycling=.true.
       else if (trim(time_sample%extrap_outside) == "persist_closest") then
          primary_item%persist_closest=.true.
+         primary_item%cycling=.false.
       else if (trim(time_sample%extrap_outside) == "none") then
          primary_item%cycling=.false.
          primary_item%persist_closest=.false.
diff --git a/gridcomps/ExtData2G/ExtDataSample.F90 b/gridcomps/ExtData2G/ExtDataSample.F90
index e7d9c6ce168f..ef5f075cab20 100644
--- a/gridcomps/ExtData2G/ExtDataSample.F90
+++ b/gridcomps/ExtData2G/ExtDataSample.F90
@@ -38,14 +38,14 @@ function new_ExtDataTimeSample(config,unusable,rc) result(TimeSample)
 
       call TimeSample%set_defaults()
 
+      TimeSample%extrap_outside = "none"
       if (ESMF_HConfigIsDefined(config,keyString="extrapolation")) then
          TimeSample%extrap_outside=ESMF_HConfigAsString(config,keyString="extrapolation",_RC)
       end if
 
+      TimeSample%time_interpolation = .true.
       if (ESMF_HConfigIsDefined(config,keyString="time_interpolation")) then
          TimeSample%time_interpolation = ESMF_HConfigAsLogical(config,keyString="time_interpolation",_RC)
-      else
-         TimeSample%time_interpolation = .true.
       end if
 
       if (ESMF_HConfigIsDefined(config,keyString="exact")) then