diff --git a/environments/analysis3/environment.yml b/environments/analysis3/environment.yml
index c9c72ff..a446fa8 100644
--- a/environments/analysis3/environment.yml
+++ b/environments/analysis3/environment.yml
@@ -13,8 +13,8 @@ dependencies:
   - access-intake-esm=2026.7.1=py_0
   - access-intake-utils=0.1.7=py_0
   - access-med-tools=0.1.23=pypy_0
-  - access-moppy=1.6.3b=py_0
-  - access-moppy-esmval=1.6.3b=0
+  - access-moppy=1.6.4b=py_0
+  - access-moppy-esmval=1.6.4b=0
   - access-nri-intake=1.6.2=py_0
   - access-py-telemetry=0.1.10=py_0
   - accessible-pygments=0.0.5=pyhd8ed1ab_1
diff --git a/environments/analysis3/pixi.lock b/environments/analysis3/pixi.lock
index 0e4052b..0faa2fe 100644
--- a/environments/analysis3/pixi.lock
+++ b/environments/analysis3/pixi.lock
@@ -19,8 +19,8 @@ environments:
       - conda: https://conda.anaconda.org/accessnri/noarch/access-intake-esm-2026.7.1-py_0.conda
       - conda: https://conda.anaconda.org/accessnri/noarch/access-intake-utils-0.1.7-py_0.tar.bz2
       - conda: https://conda.anaconda.org/accessnri/noarch/access-med-tools-0.1.23-pypy_0.tar.bz2
-      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.3b-py_0.conda
-      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.3b-0.conda
+      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.4b-py_0.conda
+      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.4b-0.conda
       - conda: https://conda.anaconda.org/accessnri/noarch/access-nri-intake-1.6.2-py_0.conda
       - conda: https://conda.anaconda.org/accessnri/noarch/access-py-telemetry-0.1.10-py_0.tar.bz2
       - conda: https://conda.anaconda.org/accessnri/noarch/ecgtools-access-2025.10.7-py_0.tar.bz2
@@ -1504,8 +1504,8 @@ environments:
       - conda: https://conda.anaconda.org/accessnri/noarch/access-intake-esm-2026.7.1-py_0.conda
       - conda: https://conda.anaconda.org/accessnri/noarch/access-intake-utils-0.1.7-py_0.tar.bz2
       - conda: https://conda.anaconda.org/accessnri/noarch/access-med-tools-0.1.23-pypy_0.tar.bz2
-      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.3b-py_0.conda
-      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.3b-0.conda
+      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.4b-py_0.conda
+      - conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.4b-0.conda
       - conda: https://conda.anaconda.org/accessnri/noarch/access-nri-intake-1.6.2-py_0.conda
       - conda: https://conda.anaconda.org/accessnri/noarch/access-py-telemetry-0.1.10-py_0.tar.bz2
       - conda: https://conda.anaconda.org/accessnri/noarch/ecgtools-access-2025.10.7-py_0.tar.bz2
@@ -3033,9 +3033,9 @@ packages:
   license_family: APACHE
   size: 46216
   timestamp: 1761304298179
-- conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.3b-py_0.conda
-  sha256: b808f8fab427c41dce591184ff3a4569b532863cb433582a4d4e07665ffc852b
-  md5: 90fb2f9d7fad10572abb38781a1d5908
+- conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.4b-py_0.conda
+  sha256: 48d95d0275dac79fa944488212695ade76897a05764c1590662a3f3f31deeee9
+  md5: 467c95e63b7b3657b0b2f8beeb878af2
   depends:
   - cftime
   - dask
@@ -3051,18 +3051,18 @@ packages:
   - tqdm
   - xarray
   license: Apache-2.0
-  size: 11078749
-  timestamp: 1784096385523
-- conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.3b-0.conda
+  size: 11127242
+  timestamp: 1784159953421
+- conda: https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.4b-0.conda
   noarch: python
-  sha256: 791ae7926306fecc1b000afe8176df6d5a35d50ed4999344beae64677af579f1
-  md5: 0c463696615f06595fe199f3f5761861
+  sha256: ddb3eaf288611cbff8aeaa9814846f54d8ea067b716a19520ecb8def697ee107
+  md5: e77708ddbe8a34954c4565c2b4344c76
   depends:
-  - access-moppy 1.6.3b py_0
+  - access-moppy 1.6.4b py_0
   - esmvalcore >=2.14
   license: Apache-2.0
-  size: 9146
-  timestamp: 1784096392718
+  size: 9182
+  timestamp: 1784159962572
 - conda: https://conda.anaconda.org/accessnri/noarch/access-nri-intake-1.6.2-py_0.conda
   sha256: 25d58c9af852d63c7bbba59062dad14e4ac2b4ecb11062843949a74634df9dfc
   md5: 446719c0e7d24f9471a8c717385fc596
diff --git a/environments/analysis3/pixi.toml b/environments/analysis3/pixi.toml
index a8be0d5..bdfe99b 100644
--- a/environments/analysis3/pixi.toml
+++ b/environments/analysis3/pixi.toml
@@ -53,7 +53,7 @@ intake-virtual-icechunk = { version = "==0.2.2", channel = "accessnri" }
 intake-dataframe-catalog = { version = "==0.5.1", channel = "conda-forge" }
 yamanifest = { version = ">=0.3.12", channel = "accessnri" }
 access-med-tools = { version = "==0.1.23", channel = "accessnri" }
-access-moppy-esmval = { version = "==1.6.3b", channel = "accessnri" }
+access-moppy-esmval = { version = "==1.6.4b", channel = "accessnri" }
 shumlib = { channel = "accessnri" }
 aiohttp = "*"
 aiohttp-cors = "*"
diff --git a/environments/analysis3/solved.json b/environments/analysis3/solved.json
index 14fcd6d..34e9e1c 100644
--- a/environments/analysis3/solved.json
+++ b/environments/analysis3/solved.json
@@ -280,24 +280,24 @@
   },
   {
     "name": "access-moppy",
-    "version": "1.6.3b",
+    "version": "1.6.4b",
     "build": "py_0",
     "build_number": 0,
-    "size_bytes": 11078749,
+    "size_bytes": 11127242,
     "kind": "conda",
     "source": "https://conda.anaconda.org/accessnri",
     "license": "Apache-2.0",
     "license_family": null,
     "is_explicit": false,
-    "md5": "90fb2f9d7fad10572abb38781a1d5908",
-    "sha256": "b808f8fab427c41dce591184ff3a4569b532863cb433582a4d4e07665ffc852b",
+    "md5": "467c95e63b7b3657b0b2f8beeb878af2",
+    "sha256": "48d95d0275dac79fa944488212695ade76897a05764c1590662a3f3f31deeee9",
     "arch": null,
     "platform": null,
     "subdir": "noarch",
-    "timestamp": 1784096385523,
+    "timestamp": 1784159953421,
     "noarch": "python",
-    "file_name": "access-moppy-1.6.3b-py_0.conda",
-    "url": "https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.3b-py_0.conda",
+    "file_name": "access-moppy-1.6.4b-py_0.conda",
+    "url": "https://conda.anaconda.org/accessnri/noarch/access-moppy-1.6.4b-py_0.conda",
     "index_url": null,
     "requested_spec": null,
     "constrains": [],
@@ -320,29 +320,29 @@
   },
   {
     "name": "access-moppy-esmval",
-    "version": "1.6.3b",
+    "version": "1.6.4b",
     "build": "0",
     "build_number": 0,
-    "size_bytes": 9146,
+    "size_bytes": 9182,
     "kind": "conda",
     "source": "https://conda.anaconda.org/accessnri",
     "license": "Apache-2.0",
     "license_family": null,
     "is_explicit": true,
-    "md5": "0c463696615f06595fe199f3f5761861",
-    "sha256": "791ae7926306fecc1b000afe8176df6d5a35d50ed4999344beae64677af579f1",
+    "md5": "e77708ddbe8a34954c4565c2b4344c76",
+    "sha256": "ddb3eaf288611cbff8aeaa9814846f54d8ea067b716a19520ecb8def697ee107",
     "arch": null,
     "platform": null,
     "subdir": "noarch",
-    "timestamp": 1784096392718,
+    "timestamp": 1784159962572,
     "noarch": "python",
-    "file_name": "access-moppy-esmval-1.6.3b-0.conda",
-    "url": "https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.3b-0.conda",
+    "file_name": "access-moppy-esmval-1.6.4b-0.conda",
+    "url": "https://conda.anaconda.org/accessnri/noarch/access-moppy-esmval-1.6.4b-0.conda",
     "index_url": null,
-    "requested_spec": "version===1.6.3b channel=accessnri",
+    "requested_spec": "version===1.6.4b channel=accessnri",
     "constrains": [],
     "depends": [
-      "access-moppy 1.6.3b py_0",
+      "access-moppy 1.6.4b py_0",
       "esmvalcore >=2.14"
     ],
     "track_features": []