Issue I331 [7,8,critical,resolved] Acceleration error in overlap of electrostatic PA with magnetic PA of higher grid density. Reported by simonp-20061206. Description: If an electrostatic PA overlaps a magnetic PA and the magnetic PA has a higher grid density, then the electrostatic accelerations in the overlap region are incorrectly multiplied by the ratio of the two grid densities. This is a fairly serious error that surprisingly was not reported earlier, though in practice the necessary conditions might arrise in only small number of simulations assuming magnetic fields are not normally simulated to higher accuracy than electrostatic ones in SIMION. This error was first detected when Data Recording reported a KE_error value that was enormous, indicating energy was obviously not being conserved. Affects: 7.0.0-7.0.3 and 8.0.0. Resolved in 7.0.4 and 8.0.1.