TDB, transactions and SELECT FROM or SELECT FROM NAMED

Using apache-jena-libs 2.11.2
I have the following code:

Dataset retval = TDBFactory.createDataset();
retval.begin(ReadWrite.WRITE);
// read <file:/home/claude/git/roadmap/target/test-classes/MockRoadmap.ttl>
URL url = ReadTest.class.getResource("/MockRoadmap.ttl");
Model model = retval.getNamedModel(url.toString());
model.read(url.toString(), "TURTLE");
// <file:/home/claude/git/roadmap/target/test-classes/MockRoadmap.ttl>
SelectBuilder sBuilder = RoadmapDataset
.setPrefixes(new SelectBuilder())
.addPrefix( "xsd", "http://www.w3.org/2001/XMLSchema#")
.addPrefix( "epm", EndpointMonitor.NAMESPACE )
//.from("file:/home/claude/git/roadmap/target/test-classes/MockRoadmap.ttl")
.addGraph( "?g", new SelectBuilder()
.addWhere("?s", "void:sparqlEndpoint", "?e")

// print the query
System.out.println( sBuilder.build() );
QueryExecution qe2 = QueryExecutionFactory.create(
QueryFactory.create(sBuilder.build()), retval);
ResultSet rs = qe2.execSelect();
while (rs.hasNext())

QuerySolution qs = rs.next();
System.out.println( "result="+qs );

the query it produces is
PREFIX afn: <http://jena.hpl.hp.com/ARQ/function#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX voidext: <http://rdfs.org/ns/void-ext#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX void: <http://rdfs.org/ns/void#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX epm: <http://localhost/endpointMonitor#>
SELECT *
WHERE {
GRAPH ?g {
?s void:sparqlEndpoint ?e .

producing:

result=( ?e = <http://localhost/master/sparql> ) ( ?g =
<file:/home/claude/git/roadmap/target/test-classes/MockRoadmap.ttl> ) ( ?s
= <http://localhost/master> )
result=( ?e = <http://localhost:8083/slave1/sparql> ) ( ?g =
<file:/home/claude/git/roadmap/target/test-classes/MockRoadmap.ttl> ) ( ?s
= <http://localhost:8083/slave1> )
result=( ?e = <http://localhost:8083/slave2/sparql> ) ( ?g =
<file:/home/claude/git/roadmap/target/test-classes/MockRoadmap.ttl> ) ( ?s
= <http://localhost:8083/slave2> )

If I modify the query builder to produce

PREFIX afn: <http://jena.hpl.hp.com/ARQ/function#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX voidext: <http://rdfs.org/ns/void-ext#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX void: <http://rdfs.org/ns/void#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX epm: <http://localhost/endpointMonitor#>
SELECT *
FROM <file:/home/claude/git/roadmap/target/test-classes/MockRoadmap.ttl>
WHERE {
GRAPH ?g {
?s void:sparqlEndpoint ?e .

I get no output

if I change FROM to FROM NAMED I get no output

if I change the WHERE clause to
WHERE {
?s void:sparqlEndpoint ?e .

with FROM or FROM NAMED or no FROM statement at I get not output.

I am looking for something that will produce the results from the first
query without looking at all the named graphs. Is there a way to do that?
I thought that FROM NAMED would limit the named graphs to query but it
seems to exclude the one I want.
I thought that FROM would make the named graph the default graph but that
doesn't seem to work either.

Any help would be appreciated.