For some reason the output vtk in the truss chain example is not correct and an error is produced when opening with paraview.
The connectivity seems to have an issue...
CELLS 10 90
8 0 1 2 3 4 5 6 7
8 8 9 10 11 12 13 14 15
8 24 25 26 27 28 29 30 31
8 48 49 50 51 52 53 54 55
8 80 81 82 83 84 85 86 87
8 120 121 122 123 124 125 126 127
8 168 169 170 171 172 173 174 175
8 224 225 226 227 228 229 230 231
8 288 289 290 291 292 293 294 295
8 360 361 362 363 364 365 366 367