diff -r e13543d716b6 -r fc4af5685aa3 bacnet/BacnetSlaveEditor.py
--- a/bacnet/BacnetSlaveEditor.py	Wed Apr 24 02:15:33 2024 +0200
+++ b/bacnet/BacnetSlaveEditor.py	Fri Apr 26 09:24:26 2024 +0200
@@ -367,7 +367,7 @@
         "Engineering Units": {"GridCellEditor": wx.grid.GridCellChoiceEditor,
                               # use string renderer with choice editor!
                               "GridCellRenderer": wx.grid.GridCellStringRenderer,
-                              "GridCellEditorConstructorArgs": [x[0] for x in BACnetEngineeringUnits]}
+                              "GridCellEditorConstructorArgs": [[x[0] for x in BACnetEngineeringUnits]]}
     }
 
     # obj_properties should be a dictionary, with keys "Object Identifier",