diff --git a/backend/pkdb_app/data/models.py b/backend/pkdb_app/data/models.py
index 2845bda6..45549e25 100644
--- a/backend/pkdb_app/data/models.py
+++ b/backend/pkdb_app/data/models.py
@@ -214,7 +214,8 @@ def validate_timecourse(self, timecourse):
                     name = self.get_name(timecourse[key], value)
                 else:
                     name = list(timecourse[key])
-                raise ValueError(f"Subset used for timecourse is not unique on '{key}'. Values are '{name}'. "
+                label = timecourse['label']
+                raise ValueError(f"Subset with label '{label}' used for timecourse is not unique on '{key}'. Values are '{name}'. "
                                  f"Check uniqueness of labels for timecourses.")
 
 
diff --git a/backend/pkdb_app/outputs/pk_calculation.py b/backend/pkdb_app/outputs/pk_calculation.py
index 73fb5652..5e563bb1 100644
--- a/backend/pkdb_app/outputs/pk_calculation.py
+++ b/backend/pkdb_app/outputs/pk_calculation.py
@@ -43,9 +43,11 @@ def pkoutputs_from_timecourse(subset: Subset) -> List[Dict]:
             if dosing:
                 if dosing.application.info_node.name == "single dose" and timecourse["substance"] == dosing.substance.pk:
                     pkinf = pharmacokinetics.TimecoursePK(**variables)
+
             if not pkinf:
                 _ = variables.pop("dosing", None)
                 _ = variables.pop("intervention_time", None)
+                print(variables)
                 pkinf = pharmacokinetics.TimecoursePKNoDosing(**variables)
 
             pk = pkinf.pk