Issue I509 [defect,prg,resolved-in-8.0-only] "illegal start for seg" error. The following error: SIMION Error: Runtime Error: Illegal Start for Time_Step Seg may occur when using a workbench with overlapping electric and magnetic potential arrays that each have a PRG program attached. A workaround may be to define a tstep_adjust segment in both the magnetic and electric programs. Reported by steveb-20080806. Already fixed in 8.0.5-TEST20. Also reported in http://www.simion.com/discuss/viewtopic?p=2923 (7.0). Affects 8.0.0-8.0.5-TEST20. Resolved in 8.0.5-TEST21.