Hi Prasad,
The error you are experiencing could be a couple of things.
Try the following:
1) If this occurs on the first time running it from a development, try doing a simple refresh. See if that solves it
2) If the input parameters feeding into the code stage are populated by a single Data Item, ensure that there is a data type stipulated.
3) If the input parameters are fed from a Collection, ensure that this collection is populated.
Let me know how you get on.
Thanks,
James