Thanks so much for all the replies! :) Jos--I wasn't a member of the list, but I am now! I will ask there also. Thanks... Rick--shhh...I won't tell! LOL I did have multiple layers & I unchecked all of them but the layers just turned black. I'm sure I screwed up somewhere! I don't have the parameter file here at work, so I'll have to try again tonight--maybe I had another mapping function that was goofing it up. I may be in touch with you again soon. Yvonne--yes, I did try that, but it still didn't work. I'm totally new to the program, so I'm sure it's user error, though! :) I'll try again tonight & let you know. Thanks again for all your assistance & making a newbie feel welcome here! :)