The attachment has worked this time.

Instead of having a variable number of "pages" in your Invoice sheet, which I imagine will change each month, would it not be better for you to select the Invoice number from a drop-down, and just have one invoice that you can print out (or save as a pdf, for example), and then select the next invoice? You would need to record the invoice number in your main sheet, perhaps in I67 downwards.

Hope this helps.

Pete