Syntax Error in Script

Hi All,

I am new to Unix, I have written the following script in ksh and get a syntax error :wall:. I need some help to figure out the error and reason. The script below uses some variables from an environment file, also it executes a sql file. The sql file is correct and has no problems. I need some help in Identifying the syntactical error in the script. I have pasted the output after the script.

#!/bin/ksh
 #*********************************************************************************
 #DAMA202.ksh Notification When XX Not Processing
 #*********************************************************************************
 #

#*********************************************************************************
 #source in AMR function library
 . $HOME"/scripts/amrksh.lib"
  
 startjob_amr $0
  
 #*******************************************************************************
 #*STEP0  Get file name for log file
 #*******************************************************************************
  
 startstep_amr STEP0
 AMA202L11=$(amr_get_file_gen_name AMA202L1)   #Log file
 if (($? != 0))
    then
    ppllog "amr_get_file_gen_name failed"
    exit 1
 fi
  
 #*******************************************************************************
 #*STEP1  Run the check processing script in a loop.  If the query finds no 
 #*       processing, send an e-mail.
 #*******************************************************************************
  
 startstep_amr STEP1
 lasttime_warn=0
 integer time_count=0
 while (($time_count < $DAMA202_TIME_COUNT))
   do
  
    WINDOW_OPEN=$(in_TNSP_maintenance_window)  
    if [[ "$WINDOW_OPEN" = "Y" ]]
    then
      ppllog "TNSP Batch Window is open-skipping-"$0
      sleep ${DAMA202_SLEEP_TIME}
    else
  
  
       sqlplus $USER/$PASSWORD@$ORACLE_SID\
        @${AMR_SCRIPTS_PATH}DAMA202.sql ${AMA202L11} ${DAMA202_SLEEP_TIME}
  
       RC=$?
  
       mv ${AMA202L11}.lst ${AMA202L11}
       if (($? != 0))
       then
          ppllog "SQL file rename failed"
          exit 10
       fi
  
  
       if (($RC != 0))
       then
          if (($RC == 1))
          then
             if (($lasttime_warn == 0))
             then
                cat ${AMA202L11} | mailx -s "DCSI is not processing" ${DAMA202_EMAIL}
             else
                cat ${AMA202L11} | mailx -s "CRITICAL - DCSI is not processing" ${DAMA202_EMAIL_PAGE}
             fi
          else
             ppllog "Check for DCSI not processing failed"
             exit 11
          fi
       fi
       lasttime_warn=$RC         
    fi
  
    time_count=`expr $time_count + 1`
  
 #*********************************************************************************
 # #6 Exit script successfully if time is between 5:30 AM and 6 AM
 #*********************************************************************************                       
    NOW=$(date +%0H%0M)
    if (( $NOW > 529 ))
    then if (( $NOW < 601))
         then endjob_amr $0
         fi
    fi
 done
  
 #*********************************************************************************
 #Normal Termination
 #*********************************************************************************
 endjob_amr $0

Output:
--------------

Using default environment file
  
 SQL*Plus: Release 9.2.0.8.0 - Production on Mon Aug 8 15:00:52 2011
  
 Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.
  
  
 Connected to:
 Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
 JServer Release 9.2.0.8.0 - Production
  
 Disconnected from Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Producti
 on
 JServer Release 9.2.0.8.0 - Production
  
 expr: Syntax error
  
  
 SQL*Plus: Release 9.2.0.8.0 - Production on Mon Aug 8 15:01:53 2011
  
 Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.
  
  
 Connected to:
 Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
 JServer Release 9.2.0.8.0 - Production
  
 Disconnected from Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Producti
 on
 JServer Release 9.2.0.8.0 - Production
 0
 ./DAMA202.ksh[72]: 1:  not found
  
 SQL*Plus: Release 9.2.0.8.0 - Production on Mon Aug 8 15:02:54 2011
  
 Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.
  
  
 Connected to:
 Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
 JServer Release 9.2.0.8.0 - Production
  
 Disconnected from Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Producti
 on
 JServer Release 9.2.0.8.0 - Production
 0
 ./DAMA202.ksh[72]: 1:  not found

It seems to be having trouble with time_count=`expr $time_count + 1`, but that seems to work with my ksh fine.

Why not try:

let time_count=time_count+1