In this very simple th2 file are only four symbols: line rope and three lines wall one of them with -outline none. After exporting the map from this th2 file (source rope.th2, export map) walls are generated. rope no. What is more strange, if I tried to export map only with line rope -clip off the compilation finished with error 256. It looks as a bug isn’t it. m.s. encoding utf-8 ##XTHERION## xth_me_area_adjust -132.0 -177.0 384.0 407.0 ##XTHERION## xth_me_area_zoom_to 100 scrap scrap1 -scale [0 0 256 256 0.0 0.0 10 10 m] line wall 15.0 160.0 33.0 78.0 51.0 36.0 110.0 -10.0 169.0 -56.0 214.0 -43.0 214.0 -43.0 smooth off endline line wall 248.0 71.0 239.0 136.0 277.0 118.0 221.0 185.0 165.0 252.0 93.0 273.0 58.0 274.0 endline line wall -outline none 55.0 142.0 173.0 -8.0 endline line rope -visibility on 55.0 203.0 135.0 116.0 202.0 44.0 endline endscrap xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx encoding utf-8 ##XTHERION## xth_me_area_adjust -132.0 -177.0 384.0 407.0 ##XTHERION## xth_me_area_zoom_to 100 scrap scrap1 -scale [0 0 256 256 0.0 0.0 10 10 m] line rope -clip off 55.0 203.0 135.0 116.0 202.0 44.0 endline endscrap xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx encoding utf-8 source ./rope.th2 export map -o rope.pdf -layout-color map-bg 90