Problems with while loop

Hi
I am new to Unix. I have a script which I have copied and doctored slightly and now seem to have problems with an unmatched while, and can't see the problem. Could anyone please tell me what I'm doing wrong?!
Many thanks
F

set MDSTARTJOB=3
set MDENDJOB=11
set MDCURRENTJOB=$MDSTARTJOB
set MDINPUT=0

echo -n "Starting script at: "
date
echo ""

while ( $MDCURRENTJOB <= $MDENDJOB )
echo -n "Job $MDCURRENTJOB started at: "
date
@ MDINPUT = $MDCURRENTJOB - 1
sander -O -i 1GTERM_Ome_SOLV_IONS_md_1800ps.in \
-o 1GTERM_Ome_SOLV_IONS_md$MDCURRENTJOB.out \
-p 1GTERM_Ome_SOLV_IONS_rst.prmtop
-c 1GTERM_Ome_SOLV_IONS_md$MDINPUT.rst \
-r 1GTERM_Ome_SOLV_IONS_md$MDCURRENTJOB.rst \
-x 1GTERM_Ome_SOLV_IONS_md$MDCURRENTJOB.mdcrd
echo -n "Job $MDCURRENTJOB finished at: "
date
@ MDCURRENTJOB = $MDCURRENTJOB + 1
end
echo "ALL DONE"

what's your shell?

Assuming bash, you could try using 'export' instead of 'set'.

Code is also much easier to read when indented. you can use [code] tags to preserve indenting.

I think you have lost the loop start and end 'commands' - shpoudl you not have a 'do' after the while and a 'done' at the end of the looping code?