Hi, I have a survey which compiles correctly at 1:500 or 1:2000, but at 1:1000 produces the following error from Metapost: This is MetaPost, Version 0.641 (Web2c 7.5.2) (mem=mpost 2004.3.2) 9 MAR 2009 13:06 **data.mp (data.mp [4001] [4002] [4003] [4004] [4005] [4006] [4007] [4008] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] ! I can't find file `mptextmp'. <scantokens> input mptextmp <to be read again> endgroup <to be read again> , s_scalebar->...mal((EXPR0))&"\thinspace"&(EXPR2)), origin);endgroup l.10077 ...ar(100, 1, "\thfb\char109 \mainfont{}") ; Please type another input file name ! Emergency stop. <scantokens> input mptextmp <to be read again> endgroup <to be read again> , s_scalebar->...mal((EXPR0))&"\thinspace"&(EXPR2)), origin);endgroup l.10077 ...ar(100, 1, "\thfb\char109 \mainfont{}") ; *** (job aborted, file error in nonstop mode) The problem disappears when a particular scrap is commented-out in the map definition, although I can't see anything particularly strange about that scrap. How should I go about debugging this? Duncan.