Hi Gerd Patch attached to fix MdrSummary readHeaderLen, cope with different hdr lengths more clearly and improve output. I've found I can now split my old "City Navigator Europe NT" map and look at the MDR, which includes sections 30/31, 32/33, 34, 37 & 38 codePage=1252 id1=18 id2=1 unk=0x0011 hdrLen=708 Compressed strings flag=0x0000 MDR 1 NR=265 (000109) RS=4 magic=0x00000002 2 NR=0 (000000) RS=2 magic=0x00000000 3 NR=0 (000000) RS=2 magic=0x00000000 4 NR=0 (000000) RS=3 magic=0x00000000 MDR 5 NR=633075 (09a8f3) RS=15 magic=0x00003e51 MDR 6 NR=181613 (02c56d) RS=4 magic=0x00000001 7 NR=0 (000000) RS=9 magic=0x00001ae2 8 DS=0 (00000000) magic=0x00000000 MDR 9 NR=1 (000001) RS=4 magic=0x00000000 MDR 10 DS=1607528 (00188768) magic=0x00000000 MDR 11 NR=401882 (0621da) RS=13 magic=0x00000575 12 DS=0 (00000000) magic=0x00000000 13 DS=0 (00000000) magic=0x00000000 14 DS=0 (00000000) magic=0x00000000 15 DS=0 (00000000) magic=0x00000000 16 DS=0 (00000000) magic=0x00000000 MDR 17 DS=2868654 (002bc5ae) magic=0x00000000 18 DS=0 (00000000) magic=0x00000000 19 DS=0 (00000000) magic=0x00000000 MDR 20 DS=65810719 (03ec311f) magic=0x00060000 21 DS=0 (00000000) magic=0x00000000 MDR 22 NR=8006434(7a2b22) RS=9 magic=0x0004035e 23 NR=0 (000000) RS=9 magic=0x00000000 MDR 24 NR=15516 (003c9c) RS=7 magic=0x00000000 MDR 25 NR=649642 (09e9aa) RS=3 magic=0x00000000 26 DS=0 (00000000) magic=0x00000000 27 DS=0 (00000000) magic=0x00000000 28 NR=0 (000000) RS=13 magic=0x00000000 MDR 29 NR=1452 (0005ac) RS=20 magic=0x000003f6 MDR 30 NR=637 (00027d) RS=4 magic=0x00000000 MDR 31 DS=3983 (00000f8f) magic=0x00000000 MDR 32 NR=566 (000236) RS=4 magic=0x00000000 MDR 33 DS=3039 (00000bdf) magic=0x00000000 MDR 34 NR=12 (00000c) RS=3 magic=0x00000000 35 NR=0 (000000) RS=3 magic=0x00000000 36 NR=0 (000000) RS=4 magic=0x00000000 MDR 37 NR=2194204(217b1c) RS=23 magic=0x00000000 MDR 38 NR=17120 (0042e0) RS=40 magic=0x00000033 39 NR=0 (000000) RS=22 magic=0x00000000 40 DS=0 (00000000) magic=0x00000000 Ticker