not a legal oleaut date


You have landed this page it means you have solution already ! I get you the direction 

After l lot of finding on the error "not a legal oleaut data", the root cause is that your some of your transactions or data having invalid year format

 For an Example :  01-01-0018

The red colored year format is the culprit. 


Solution: 

The expected date format should be 01-01-2018, after resetting the date format try to export to excel or reproduce the steps you have been getting the error, should be NO MORE Error.