Diagnosis
You selected the option "Only create URL for the specifiedtransaction", but you have not specified the transaction code(TCODE), which is required here.

Procedure
Enter a transaction code and, if necessary, the name of a logicalsystem. The transaction codes offered by the search help always referto the current system. These may differ from the data (transactioncodes, classification for the user interface, and so on) in othersystems.