Steps to Reproduce: -->Once done with the recording stuff -->Navigate to Test Plan and required user defined variables -->Navigate to Search and with the port used while recording -->Try to replace the port number to ${port} -->Click on Replace All
Version 5.1 is currently voted on and should be released soon. *** This bug has been marked as a duplicate of bug 62829 ***
This issue has been migrated to GitHub: https://github.com/apache/jmeter/issues/5014