JMeter – Changing user defined variables from command line

Well, with -J argument you are setting PROPERTY, and in User Defined Variables config – VARIABLE. It will define two different entities, although having the same name, they will have different values.

In your situation you can do the following.

1. Set jmeter property value in command-line as above in your question

   ...-Jtestproperty=202

2. In UDV config set variable with value from property:

   testproperty = ${__property(testproperty,,)}

   or

   testproperty = ${__P(testproperty,)}

3. Use ${testproperty} further in the script.

As well you can possibly do the same wihout using variable and simply refer property as {__P(testproperty,)} to get value set in command-line.