Issue #2367: reading from table gives Unexpected exception

reading from table gives Unexpected exception

[ObjectDB 2.6.3] Unexpected exception (Error 990)
  Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_131 (on Windows 10 10.0).
Please report this error on http://www.objectdb.com/database/issue/new
com.objectdb.o.InternalException: null
com.objectdb.o.InternalException
    at com.objectdb.o.BYR.o(BYR.java:113)
    at com.objectdb.o.BYR.w(BYR.java:206)
    at com.objectdb.o.VUT.j(VUT.java:350)
    at com.objectdb.o.OBI.r(OBI.java:282)
    at com.objectdb.o.OBI.Vp(OBI.java:240)
    at com.objectdb.o.BQI.Vz(BQI.java:151)
    at com.objectdb.o.PRG.ai(PRG.java:782)
    at com.objectdb.o.PRG.ag(PRG.java:711)
    at com.objectdb.o.PRG.af(PRG.java:553)
    at com.objectdb.o.QRM.Vb(QRM.java:286)
    at com.objectdb.o.MST.Vb(MST.java:988)
    at com.objectdb.o.WRA.Vb(WRA.java:311)
    at com.objectdb.o.WSM.Vb(WSM.java:115)
    at com.objectdb.o.QRR.g(QRR.java:247)
    at com.objectdb.o.QRR.f(QRR.java:153)
    at com.objectdb.jpa.JpaQuery.getResultList(JpaQuery.java:716)
    at main.java.dao.SelectivityCustomerDao.readSelectivityData(SelectivityCustomerDao.java:48)

Unfortunately the information in this stack trace is not sufficient to identify the problem.

Note, however, that many issues have been fixed since version 2.6.3 (which is more than 3 years old).

Therefore, you may be able to solve this issue just by upgrading ObjectDB.