You could have the CommandButton call the macro that works.

The problem is likely this line:

Set myC = Range("I6:I233").Find(What:="", LookAt:=xlWhole)

Excel takes the range to be on whatever the active sheet is.

If you change it to:

Set myC = Worksheets.("Printout").Range("I6:I233").Find(What :="",
LookAt:=xlWhole)

the range is better specified.

HTH,
Merjet

I didn't get a runtime error on the modified line:
Set myC = Worksheets("Printout").Range("I6:I233").Find(What: ="",
LookAt:=xlWhole)

However, I did on this one:
Range(myC, Range("I233")).Resize(, 5).Delete Shift:=xlUp

until I also modified it to:
Worksheets("Printout").Range(myC,
Worksheets("Printout").Range("I233")).Resize(, 5).Delete Shift:=xlUp

HTH,
Merjet