--- /usr/share/hplip/prnt/cups_old.py	2019-11-14 09:50:30.793122685 +0100
+++ /usr/share/hplip/prnt/cups.py	2019-11-14 09:50:12.270390419 +0100
@@ -179,7 +179,10 @@
     family_type = []
     for m in dict:
         if model in m:
-          family_type= dict[m]['family-class']
+          try:
+            family_type= dict[m]['family-class']
+          except:
+            family_type= ['Undefined']
 
     for f in models.FAMILY_CLASSES:
         if f in family_type: