2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/33456Weinberg's energy-momentum pseudotensor is obtained for Schwarzschild metric in harmonic coordinates. On the horizon it possesses unintegrable singularities. For this reason the total energy of a collapsar can't be obtained by integrating energy density over the system's volume. The implication for gravity theories is noted. A thought on how to choose unique energy-momentum tensor is given.5 pages, Latex, no figuresGeneral Relativity and Quantum Cosmologytext