Re: Crystal Reports error
I was receiving the same error. It showed up when I changed the location of the database to a different Excel file. I figured out that the formatting of one of the columns was off. It was a database of customer billing information, and it treated the zip code like a regular number. When I changed it to zip code format, then it worked. Not sure if that will help or not, but try checking the formatting of your database.
Re: Crystal Reports error
you need to give more info. what db you are using?