References to librefs with concatenated libraries are not supported in DS2. Error messages like the following are generated when references to these librefs are used with DS2:

ERROR: Compilation error.
ERROR: BASE driver, schema name SASHELP was not found for this connection
ERROR: Table "SASHELP.CLASS" does not exist or cannot be accessed
ERROR: Unable to prepare SELECT statement for table class.

The sample DS2 program below references the SASHELP library, which is a concatenated library, and generates the errors shown above:

proc ds2;
   data _NULL_;
      method run();
         set sashelp.class;
      end;
   enddata;
run;
quit;

To circumvent this restriction, associate each libref with a single library.