VMD出现ERROR: failed on end of segment

zz200022

请问错误在哪
代码如下：
resetpsf
mol delete all
mol load pdb solvate_raw.pdb
set segnames [lsort -unique [[atomselect top all] get segname]]
foreach segname $segnames {
  [atomselect top "segname $segname"] writepdb solvate_$segname.pdb
}
foreach segname $segnames {
  segment $segname {
    auto none
    first none
    last none
    pdb solvate_$segname.pdb
  }
  coordpdb solvate_$segname.pdb $segname
}
writepsf solvate.psf
writepdb solvate.pdb