Answer / abdul sameer

At Selection Screen Output can be used only once in the
report program.
At Selection Screen On field can be used mutilple times if
the fields are different.
e.g
At Selection Screen On field1
if field1 is empty display error message.

At Selection Screen On field2
if field2 is empty display error message.

Answer / nageswar

At selection-screen out put is used to hide the partichlat
input variable.we can use one time in the report

Answer / venkateswarlu

we can use at any times in the repot.

AT SELECTION-SCREEN on output is used to change the
selection screen dynamically.

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