Your question is awfully limited on the kind of details that we would need to answer it.
That you are getting an 'empty output' (which I assume means you are getting a message about 0 LINES being returned) can have all kinds of causes.
My guess is that you don't have the correct permissions to query the database's catalog tables and it's returning the rows that you are allowed to see (none). In that case, connect using a user that is allowed to query the catalogue tables.
But other possible causes include errors in your SQL, errors in your FOCUS code, etc.
We are going to need more details if that's not it, such as the code you ran, the output it generated, the make or brand of database you are connecting to, etc.
WebFOCUS 8.1.03, Windows 7-64/2008-64, IBM DB2/400, Oracle 11g & RDB, MS SQL-Server 2005, SAP, PostgreSQL 11, Output: HTML, PDF, Excel 2010
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