diff --git a/python/plugins/processing/gui/BatchPanel.py b/python/plugins/processing/gui/BatchPanel.py
index 97b2c9e263f7..017b45514d27 100644
--- a/python/plugins/processing/gui/BatchPanel.py
+++ b/python/plugins/processing/gui/BatchPanel.py
@@ -777,6 +777,11 @@ def parametersForRow(self, row, destinationProject=None, warnOnInvalid=True):
             widget = self.tblParameters.cellWidget(row + 1, col)
             text = widget.getValue()
             if not warnOnInvalid or out.checkValueIsAcceptable(text):
+                ok, error = out.isSupportedOutputValue(text, createContext())
+                if not ok:
+                    self.parent.messageBar().pushMessage("", error, level=Qgis.Warning, duration=5)
+                    return {}, False
+
                 if isinstance(out, (QgsProcessingParameterRasterDestination,
                                     QgsProcessingParameterVectorDestination,
                                     QgsProcessingParameterFeatureSink)):