Chainparameters- calling one parameter of job into another job (of same master chain)

Hi, I am trying to call the one parameter of job into another parameter of job with in same process chain. I have created a chain with 2 step (Job1 and Job2) with Variable VAR1 & VAR2 AT step 1 and VAR3 AT STEP3. So i have tired with following below method and its not working:

VAR3 =JobChainParameters.getOutValueString('Step 1, Job 1', 'VAR1')

JCS-122021: Could not evaluate default value for parameter: Parameter VAR3 for process 77513025

Step 1 is the step1 of the chain, Job1 is the first job of the chain & Var1 is the variable of job1.

I Have also tried with below script but its giving me same error and many others way:

VAR3= chainParameters.VAR1

But, when I am trying to call in same job with below, its working fine so why the above script it not working?

VAR2= parameters.VAR1

Please advice.

Regards,

Abhishek