Whilst setting up a Table to save the form control positions, I used the following code
UPDATE ControlProps SET Left = oControl.Left,;
Top = oControl.Top,;
Height = oControl.Height,;
Width = oControl.Width WHERE Name=oControl.Name

which generated an error on compiling. By changing the Table field name to nLeft and the update expression to nLeft = oControl.Left, it compiled perfectly.

It appears that the word 'Left' is causing the error when other language 'names' are OK.