  The RUNJOB balloon-born emulsion chamber experiments have been carried out
for investigating the composition and energy spectra of primary cosmic rays at
energies 10-1000 TeV/nucleon. On the data of the treatment of RUNJOB` X-ray
emulsion chambers exposed since 1995 to 1999 year about 50 % proton tracks were
identified. In remained half of the events from proton group the one charged
primary tracks were not found in the search area determined with high accuracy
by the triangulation method using the several background heavy tracks.
Considered methodical reasons in this paper could not explain this experimental
result. The one from the probable physical reasons that is the neutrons in
cosmic ray flux does not explain it too.
