'Unix command to generate file and then check content of the file

I am new to using Linux/Unix command. I have a command that creates a Jmeter file and then in log checks if the generated Jmeter file (If there is any error in Jmeter file it will show error in percentage). If the log has some errors it provides Failure. During this process I get outcome as Failure or Success but the file does not get generated. How can I modify the command so that file gets generated as well as able to check error.

if jmeter -n -t $JMX_FILE -Jurl=$TEST_URL -Jthreads=1 -Jrampup=1 -Jcount=1 -Jsla=$SLA -f -l jmeter-results.jtl | grep "0 (0.00%)$" 
     then 
       echo Success 
       exit 0 
     else
       echo Failure 
       exit 1
      fi
linuxunix


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