Hi Mohammed
It would be great to know few more details about your issue.
1) What is the purpose of key date in your report (so that we can use customer exit variable to populate the key date automatically)
2) Is it a mandatory variable in your BEx Report (if its a mandatory, we could change it to optional after making sure that its populated based on the point 1)
3) Is the key date used in any of the restricted key figures? (just to see how complexity of your query)
Any more information if you think its important to be considered, please go ahead
Regards
Karthik