Am having an odd problem when doing
REPORT FORM (reportname) PREVIEW IN SCREEN

I'm running a report off a cursor with two records. One of the fields is named "AMOUNT". The preview comes up fine. However, if I try to do any of the following:
Page Up
Page Down
Print

I get the message

Variable 'Amount' not found

Now, curiously, I am able to print this, without error, if I do not go through PREVIEW.

(This variable is used in creation (summation) of some various report variables.)

What's going on here?

Thanks,

Jim