I have a spreadsheet in which I have added two new menu items to the toolbar. I have assigned macros to them: one to print and the other to open a userform. All works well until I save and exit. When I reopen and try to use the new menu items, an error message appears stating that two instances of the workbook are open and I can proceed no further. To cure this, I have to reassign the macros and all appears ok until I exit and reopen when the same thing happens again.