UNIX for Advanced & Expert Users

What is wrong with my syntax, I am getting bad number error. The following lines of code get the value from INI file but the variable is a combination of multiple variables. When compiling all together, I get a bad number error or changing the '((' with '{{' gets me bad substitution error. The code works if the return value is a numeric but it fails when it is a TXT. What is the best way to tackle this, any one? INI Example is at the end

SERV_CNT=1
function start {
TOT_SERV=`echo NUMBER_OF_${APPLICATION}_SERV`
while [[ $SERV_CNT -le $TOT_SERV ]]
do
#SERVER=${FIN_P1_[$SERV_CNT]}
SERVER=$((${APPLICATION}_${SERV}_[$SERV_CNT]))
#$WEB_HOME/$START_SCRIPT $SERVER
let SERV_CNT=$SERV_CNT+1
done
}


INI File:
NUMBER_OF_FIN_SERV=6

FIN_P1_[1]=FINPROD
FIN_P1_[2]=FINPROD02
FIN_P1_[3]=FINPROD03
FIN_P1_[4]=FINPROD04
FIN_P1_[5]=FINPROD05
FIN_P1_[6]= FINPROD06

Here is one way...

Code:

$ cat x
#! /usr/bin/ksh


SERV_CNT=1
function start {
        eval TOT_SERV=\$NUMBER_OF_${APPLICATION}_SERV
        while [[ $SERV_CNT -le $TOT_SERV ]] ; do
                eval SERVER=\${${APPLICATION}_${SERV}_[SERV_CNT]}
                echo $SERV_CNT $SERVER
                ((SERV_CNT=SERV_CNT+1))
        done
return 0
}


NUMBER_OF_FIN_SERV=6
FIN_P1_[1]=FINPROD
FIN_P1_[2]=FINPROD02
FIN_P1_[3]=FINPROD03
FIN_P1_[4]=FINPROD04
FIN_P1_[5]=FINPROD05
FIN_P1_[6]=FINPROD06
APPLICATION=FIN
SERV=P1
start
exit 0
$ ./x
1 FINPROD
2 FINPROD02
3 FINPROD03
4 FINPROD04
5 FINPROD05
6 FINPROD06
$

Thank you so much, you have saved my day , appreciate a lot. Once again thank you.