Folk, After almost a year of routine use, the CF card refuses to mount. A backup is installed and little if any data is lost. The mount command and trap follow. The OFSBoot.BootSystem at the bottom of the trap seems odd. Is there any advice before I dash to reformat? Thanks, ... Peter E. FileSystem.Mount MY AosFS IDE1#3 ~ TRAP 7 Index out of range (PC Native 05.01.2003) OFSAosFiles.TraverseDir PC = 8627 a = 0000001CH dpg = 1624 i = 102 OFSAosFiles.TraverseDir PC = 8815 a = 0000001CH dpg = 29 i = 3 OFSAosFiles.DirInit PC = 8998 A = 37294, 74066, 115391, 145638, 156919, 177132, 201318, 236437 ... bad = FALSE files = 0 init = FALSE k = 386 vol = 0005D7A0H OFSAosFiles.NewFS PC = 20776 ch = 00000000X fs = 00068F40H i = 2 init = FALSE prefix = "MY" s = "" vol = 0005D7A0H Oberon.Call PC = 4860 Mod = 0003DFE0H P = OFSAosFiles.NewFS PC = 20239 i = 12 j = 17 name = "NewFS" new = FALSE par = 0038D120H res = 1 FileSystem.Mount PC = 1958 alias = "AosFS" cache = 00000000H cacheSize = 0 genfs = "OFSAosFiles.NewFS" genvol = "OFSDiskVolumes.New" hashSize = 0 i = 7 par = "IDE1#3 " prefix = "MY" res = 1 s = 00000014H Oberon.Call PC = 4860 Mod = 001C38E0H P = FileSystem.Mount PC = 930 i = 11 j = 16 name = "Mount" new = FALSE par = 0038D120H res = 1 TextFrames.CallCmd PC = 12027 F = 00354D40H cmd = "FileSystem.Mount" new = FALSE par = 0038D120H pos = 656 res = 1 TextFrames.Call PC = 12915 F = 00354D40H S = 00000048H h = 0 hint = "" i = 0 new = FALSE pos = 640 TextFrames.Edit PC = 20137 F = 00354D40H Keys = {1} M = 00000060H R = 0000004CH X = 90 Y = 571 beg = 0 buf = 00000000H ch = 00000000X end = 0 keysum = {1} pos = 640 text = 00000000H time = 0 TextFrames.Handle PC = 21222 F = 00354D40H F1 = 00000000H M = 00000020H ET.Handle PC = 10006 F = 00354D40H M = 0000000CH T = 003C37A0H handled = FALSE ml = FALSE tF = 00354D40H MenuViewers.Handle PC = 4365 M = 00000014H Main = 00354D40H Menu = 003B9440H V = 001CD400H V1 = 00000000H Oberon.Loop PC = 8578 M = 00000010H N = 0000000CH V = 001CD400H X = 90 Y = 571 ch = 00000020X keys = {1} oldshift = {} shift = {} System.Init PC = 20240 F = 003D1F00H S = 00000044H T = 003D1E80H Wt = 00000050H ok = FALSE OFSBoot.Call PC = 426 c = System.Init PC = 19716 cmd = "Init" i = 11 j = 4 m = 001636C0H protect = TRUE OFSBoot.BootSystem PC = 2780 s = "System.Init" OFSBoot.$$ PC = 13 @SELF = 0003F120H SELF = 0003F120H -- http://carnot.pathology.ubc.ca/