Shell Programming and Scripting

Hi folks,

I'm trying to concatinate a time zone offset parameter to the word "GMT" and i failed.
I have the following function:
update_opmn_xml()
{
echo "\nChecking opmn.xml ..."

## Calculating timezone offset
calc_timezone_offset
echo ${TzOffset}
export opmnXml=/tmp/opmn.xml
grepOpmn="ias-instance"
lineNum=`grep -n ${grepOpmn} ${opmnXml} | awk -F: '{print $1}'`

string='<java-option value="-Drightv.root=${ORACLE_HOME}/j2ee/OC4J_RiGHT
v_${SCHEMA_NAME} -Xmx512M -Duser.timezone=GMT${TzOffset}"/>'
echo "#!/bin/ksh
ed -s ${opmnXml} <<EOF >/dev/null
${lineNum}
a
${string}
.
w
q
EOF" > /tmp/subED_1 && chmod 755 /tmp/subED_1 && /tmp/subED_1
}

The value of the parameter ${TzOffset},wgich calculated in the function calc_timezone_offset is: +03:00

In the edited file ,opmn.xml ,the following line was appended:
<java-option value="-Drightv.root=/home/ias/v9.0.3/j2ee/OC4J_RiGHTv_FOO
-Xmx512M -Duser.timezone=GMT"/>

As you can see,the value of the parameter ${TzOffset} was not concatinated.
Maybe the "+" sign made the problem?

Please advice.
Thanks in advance,
Nir

Meanwhile,I solved my problem by changing the parameter "string"
from :
string='<java-option value="-Drightv.root=${ORACLE_HOME}/j2ee/OC4J_RiGHT
v_${SCHEMA_NAME} -Xmx512M -Duser.timezone=GMT${TzOffset}"/>'

to :
string="<java-option value=\"-Drightv.root=${ORACLE_HOME}/j2ee/OC4J_RiGHTv_${SCHEMA_NAME} -Xmx512M -Duser.timezone=GMT${TzOffset}\"/>"

Changing the inverted commas (') to quotation marks (") and adding back slash (\) before some quotation marks.

Regards,
Nir