Right in the middle of input, Excel erro message appears and stops. Then
reboots itself losing data not saved. <br><br>What's up?
Clairvoyance is weak today...
What version of XL?
What version of Mac OS?
Does it happen for multiple workbooks or only one?
What error message appears?
Is there *any* pattern you can detect?
How complicated is the workbook - lots of calculations? charts? etc?