linux batch job "sleep" problem???

[mcclnx mcc <mcclnx@xxxxxxxxxxxx>]

we have Redhat 5.5 on server.  Recently we tried to use "sleep" command on batch job script some sleep work but some not sleep.   any one have ideal?


====   sample program  ===

#/bin/bash
set -v

program1
sleep 30
program2
sleep 60
program3
sleep 40
...


      
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