diff --git a/plugins/3MFReader/ThreeMFWorkspaceReader.py b/plugins/3MFReader/ThreeMFWorkspaceReader.py
index d037d8324c..73db48f1a2 100755
--- a/plugins/3MFReader/ThreeMFWorkspaceReader.py
+++ b/plugins/3MFReader/ThreeMFWorkspaceReader.py
@@ -653,7 +653,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                     # machine definition cannot be found.
                     Logger.logException("e", "Failed to deserialize definition file %s in project file %s",
                                         definition_container_file, file_name)
-                    raise
+                    definition_container = self._container_registry.findDefinitionContainers(id = "fdmprinter")[0] #Fall back to defaults.
                 self._container_registry.addContainer(definition_container)
             Job.yieldThread()