diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 1bdd412d..34c18faa 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         include:
           - os: macos-latest
             python-version: "3.10"
diff --git a/pyerrors/input/sfcf.py b/pyerrors/input/sfcf.py
index 94aa1948..64ce8899 100644
--- a/pyerrors/input/sfcf.py
+++ b/pyerrors/input/sfcf.py
@@ -184,6 +184,8 @@ def read_sfcf_multi(path, prefix, name_list, quarks_list=['.*'], corr_type_list=
 
     else:
         replica = len([file.split(".")[-1] for file in ls]) // len(set([file.split(".")[-1] for file in ls]))
+    if replica == 0:
+        raise Exception('No replica found in directory')
     if not silent:
         print('Read', part, 'part of', name_list, 'from', prefix[:-1], ',', replica, 'replica')