Could be...

But my first guess is that last week, you rightclicked on the row numbers (to
the far left). And this week, you're rightclicking on a cell.

If I'm right, you can still rightclick on a cell and then choose insert, then
choose entire row.

======
Actually, when I rightclicked on the row number, I got a plain old "Insert"
option. But it inserted the entire row.

Sandro wrote:

When i right-click on the worksheet the 'insert rows' 'delete rows' buttons
have disappeared, they were there last week, is there a setting that may have
been deactivated?
Could it be an add-in that has caused this?
--
thanks,

sandro

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Dave Peterson