shell：tcsh脚本错误set: Variable name must begin with a letter

在Xshell下运行psipred的程序runpsipred_single，代码如下：

#!/bin/tcsh

# This is a simple script which will carry out all of the basic steps
# required to make a PSIPRED prediction. Note that it assumes that the
# following programs are available in the appropriate directories:
# seq2mtx - PSIPRED V4 program
# psipred - PSIPRED V4 program
# psipass2 - PSIPRED V4 program

# NOTE: Script modified to be more cluster friendly (DTJ April 2008)

# Where the PSIPRED V4 programs have been installed
set execdir =./bin

# Where the PSIPRED V4 data files have been installed
set datadir =./data

set basename = $1:r
set rootname = $basename:t
set outname = $basename.chk

# Generate a "unique" temporary filename root
set hostid = `hostid`
set tmproot = psitmp$$$hostid

echo "Generating mtx file from sequence" $1 "..."

$execdir/seq2mtx $1 > $tmproot.mtx

if ($status != 0) then
    echo "FATAL: Error whilst running makemat - script terminated!"
    exit 1
endif

echo "Predicting secondary structure based on single sequence ..."

echo Pass1 ...

$execdir/psipred $tmproot.mtx $datadir/weights.dat $datadir/weights.dat2 $datadir/weights.dat3 > $rootname.ss

if ($status != 0) then
    echo "FATAL: Error whilst running psipred - script terminated!"
    exit 1
endif

echo Pass2 ...

$execdir/psipass2 $datadir/weights_p2.dat 1 1.0 1.0 $rootname.ss2 $rootname.ss > $rootname.horiz

if ($status != 0) then
    echo "FATAL: Error whilst running psipass2 - script terminated!"
    exit 1
endif

# Remove temporary files

echo Cleaning up ...
\rm -f $tmproot.* error.log

echo "Final output files:" $rootname.ss2 $rootname.horiz
echo "Finished."

运行结束后得到以下结果：set: Variable name must begin with a letter。

请问问题出在哪里呢？应该怎么调整呢？

已经提示你了，set，设置变量只能为 字母。
所以，你现在需要搞清楚 set的用户 ，
没特别需要，在SHELL 中，可用直接变量定义，例如你上面不用写set，直接定义变量：
execdir=./bin

必须是tcsh解释器吗？用bash解释器试试