I have a HTTP Response from JMETER as :
[{"Id":null,"Message":"2578W,","IsError":false}]
I need to pass the message "2578W" into the next HTTP request. I am using the Regular Expression Extractor in JMETER. and passing the values as: Apply to Main Sample and sub-sample
Field to Check : Body
Reference Name: ${Message}
Regular Expression: [{"Id":null,"Message":"(.*?),","IsError":false}]
Match No. 1
Default Value: Not found