The standard out of the box Aged Invoice Report does not include an option to completely exclude credit memo's.  You could "save as" and set up a version of that Standard Report and in Crystal add a filter to exclude all Invoice Transactions that are Credit Memo's. 

The standard out of the box Aged Invoice Report does not include an option to completely exclude credit memo's.  You could "save as" and set up a version of that Standard Report and in Crystal add a filter to exclude all Invoice Transactions that are Credit Memo's.