Does in_PolicyID refer to a global variable in the Variables tab? You may have forgotten to set the profile. I believe, it is reset to default on every launch. Or maybe you did a typo. It is case-sensitive and all.
And you should see what the request body is like. The request getter is usually a basic snippet in the verification tab:
RequestObject request = WSResponseManager.getInstance().getCurrentRequest()
To get the body you can use:
Ah, ok… well, then, something strange happens when the object is doing the interpolation, i guess.
Honestly speaking, I never used parametrization in the body directly, as you do, for this case I usually use a totally different approach, will check the forum and revert.
@roma.taju you have a pretty complex body, so if I will be in your shoes I will use a different approach.
E.g I will store the body template as a file, and do the needed substitutions from a testcase, using the groovy SimpleTemplate engine.
see: Template engines
I made an example of how this can be achieved some time ago, here:
So I suggest to you to build the entire body in a testcase and pass it to the testobject as a single string variable.