This is probably a so-called "steploop" dynpro, a
dynpro type that is now rarely used in the SAP system; SAP has changed almost
all steploop dynpros into table control dynpros. In this case, the
scrollbar does not depend on the window or screen size, but on the number of
elements in the table. GuiXT misinterprets this special scrollbar. Here is a workaround
for you to avoid the GuiXT
misinterpretation: use the statement NoAreaResize
at the beginning of your script.