  The effect of pressure on the copper and praseodymium magnetic order in the
system Nd(1-x)$Pr(x)Ba2Cu3$O7 with x=0.3, 0.5, 0.7, and 1 was investigated by
means of the muon spin rotation (muSR) technique. It was found that the effect
of pressure on the Neel temperatures of both copper and praseodymium is
positive for the whole range of Pr concentrations (0.3<x<1) studied. These
findings are in contrast with a number of previous reports and clarify some of
the puzzles related to the effect of pressure on superconductivity and
magnetism in the praseodymium-substituted R}(1-x)$Pr(x)Ba2Cu3O7 systems, where
R is a rare earth element.
