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integer expression expected error crontab only

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# 1  
Old 09-16-2009
integer expression expected error crontab only

I created a bash script that ran fine for awhile on a nightly crontab but then started crashing with commands not found, so I added
export PATH

and now I don't get those errors, but a while loop is crashing with

line 23: [: : integer expression expected]
a=`tail -n +2 newupdate | head -1 | cut -c44-47`
b=`tail -n +2 lastupdate | head -1 | cut -c44-47`
c=`tail -n +2 newupdate | head -1 | cut -c50-57`

while [ "$a" -ne "$b" ]; do

if I cd'ed to the /home/homedir/scripts/myscriptdir in the top of my script, is this just a path issue for finding file=newupdate without absolute path, or shouldn't my PATH be correct now that I exported it in the script? Otherwise, why is it breaking?
# 2  
Old 09-16-2009
while [ "$a" -ne "$b" ]; do
Either $a or $b does not contain an integer number.

Last edited by methyl; 09-16-2009 at 01:41 PM.. Reason: rethink
# 3  
Old 09-16-2009
If you're comparing integers try to echo the variabels $a and $b before the while statement to ensure they are integers.

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