EG is a .NET application. The sequence in which DLLs (assemblies) are loaded is, well, I'm not sure why you would care to know that.
The spirit behind RTRACE for SAS was so that customers who built line-of-business SAS/AF applications could optimize their SAS installation to contain only the necessary modules. (This was back when disk space was expensive, and we shipped SAS on 3.5" floppy disks!)
EG has no such support for a "subsetted" install, so outside than our own efforts to optimize performance of the app, we don't expect customers to be concerned with the module loading.
Also, I'm talking to our query expert about the passthru issue. It's likely that the library you're using for the query has a different default schema specified than the table you're trying to use in the query. Is this DB2? A workaround would be to assign a second library that references the desired schema, and then join with the table from that second schema. If you need more details, contact SAS Technical Support.
Chris