@ workflows : setting the matplotlib backend explicitely.

Author: elmbeech

.github/workflows/apple.yml

@@ -17,10 +17,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.13"]
+        python-version: ["3.14"]
         #python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     env:
+      MPLBACKEND: Agg  # https://github.com/orgs/community/discussions/26434
       PYTHONPATH: /Users/runner/work/physicelldataloader/physicelldataloader
 
     steps:

.github/workflows/linux.yml

@@ -17,10 +17,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.13"]
+        python-version: ["3.14"]
         #python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     env:
+      MPLBACKEND: Agg  # https://github.com/orgs/community/discussions/26434
       PYTHONPATH: /home/runner/work/physicelldataloader/physicelldataloader
 
     steps:

.github/workflows/windows.yml

@@ -17,10 +17,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.13"]
+        python-version: ["3.14"]
         #python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     env:
+      MPLBACKEND: Agg  # https://github.com/orgs/community/discussions/26434
       PYTHONPATH: D:\a\physicelldataloader\physicelldataloader
 
     steps: