How to make the user must make selctions before calculating a chart

[#1]

What is the best way to implement something which makes the user must make selections before the chart is calculated. Should I use a condition or help text or what are your ideas or experience? Thank you!

[MK_QSL]

Go to the General Tab of your Table/Chart

Under Calculated Condition write below

=GetSelectedCount(Field1)>0 or GetSelectedCount(Field2) >0

Select Error Messeges

Select Calculation Condition unfulfilled from Standard Messages

Write below in Custom Messages

Select any value from Field1 or Field2

[raviityou]

hi,

try it hope  it will work out.