If a1,a2,e2 are bookmarks,
{ IF { REF a1 } > 0 "{ ={ REF a2}*{ REF e2 }" "" }
All the {} need to be the special "field code braces, not the ones you can
type on the keyboard.
If a1, a2 and e2 are cell addresses in a table and the field is also in that
table, try
{ IF { =A1 } > 0 "{ =A2*E2 }" "" }
If the field is outside the table contianing the cells you want to
reference, you have to qualify them by putting a bookmark (let's call it
tablex) somewhere in the table (or selecting the table and bookmarking it)
then using somthing more like
{ IF { =( sum(tablex A1) } > 0 "{ =sum(tablex A2)*sum(tablex E2) }" "" }
(The "sum()" is only there because there doesn't appear to be a way to
reference the value directly, e.g.
{ =tablex A1 } and { =(tablex A1) } do not work.
There's more in Word help if you need it.
NB, if you are using table references such as A1, A2 etc., I would try to
avoid using bookmark names with the same format, e.g. A1, B10 etc.
Peter Jamieson