Is it corrupt

So its basically this formula that could be causing it. can you confirm.

=IF(ISERR(INDIRECT("'(1)'!E14")),"",INDIRECT("'(1)'!E14"))

The workbook this is in is part of my work price estimating procedures, should i be concerned about it or is it just one of those things.

Thanks for you help.

Well, if you tried the link DKO provided you would see INDIRECT listed as one of the volatile functions. So, yes - it causes your workbook to recalculate and forces Excel to see this as a change in the file.

Thanks again