I'm unable to insert columns into my worksheet. Message I get is "To prevent
possible loss of data, Excel cannot shift nonblank cells off the worksheet.

Try to to locate the last nonblank cell by pressing CTRL+END, and delete or
clear all in cell between the last cell and the end of your data. Then
select cell A1 and save your workbook to reset the last cell used.

Or, you can move the data to a new location and try again."

I tried this, but I'm still unable to insert columns. I've also cleared
print area, but still no success. Any suggestions? By the way, all columns
are filtered (if this matters).

Thanks in advance.