Hi,

Geoff wrote:
I too thought it may be a timing issue but the interesting thing now is the
HideControl sub is not being called. There is no error now as the proc is
not being called and therefore there is no attempt to hide the buttons. It
is at the hide point the Visible error occurs.

set a break point on the line:

Application.OnTime Now(), "HideControl"

If the macro stops at the point, the procedure name might be different
or conflict.
try something like:
(assuming 'HideControl' is in 'Module1' in the same workbook)

Application.OnTime Now, "'" & ThisWorkbook.Name & "'!Module1.HideControl"

--
HTH,

okaizawa