//test concurrent loading in the same transaction
BasicA ba = ((BasicA) pm.getObjectById(oids[NB_OBJECT-1], false));
ba.readF1_F2();
ba = ((BasicA) pm.getObjectById(oids[threadId], false));
ba.writeF1(ba.readF1() + "modifiedBy" + threadId);
for(int j=0; j<NB_MODIF; j++) {
// Choose an object: alternativly on each side
// of the threadId
int id = j;