How to avoid multiple users to access same tcode

Hi all,
Am creating one z tcode to display the material details for the particular reservation number. How can I avoid multiple users to access the same tcode simultaneously. If anybody works over that tcode then no other user should be able to access the same tcode until or unless the first user works over it.
Regards,
Ramya

HI,
you can even use import and export logic and check if user has entered the transaction ..
Regards,
Santosh
Message was edited by:
Santosh Kumar Patha

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How to avoid multiple users to access same tcode

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