Hi

1. error - when i change the dropdown value in D9, i get the error "unable to set the hidden property of the range class"

2. error - when ever the flag set in Column I turns "1" it should unhide the next set of rows but this too not happening.
scenarios are below:
i38 = 1 then rows 38-55 should be visible
i48 = 1 then rows 38-66 should be visible
i59 = 1 then rows 38-77 should be visible
i70 = 1 then rows 38-87 should be visible
i80 = 1 then rows 38-97 should be visible
i90 = 1 then rows 38-107 should be visible
i100 = 1 then rows 38-117 should be visible
i110 = 1 then rows 38-127 should be visible
i120 = 1 then rows 38-137 should be visible

Best
Rem0