Create Multiple MEP system By using Excel sheet

[Daan]

HI @vishalghuge2500 ,

You’re applying the Transaction.End node in the wrong place, you should use it after the FamilyType.Duplicate nodes. Then using a PassThrough node make sure those nodes are executed first before writing the parameter-values. See the example below for reference if you find it hard to follow:

Parameter Value get lost half way?

If you’re writing and trying to read those values in the same script I recommend using a Transaction.End node to make sure that the writing is completely finished before trying to read those values: [image] PS: You would probably also benefit from some documenting, as in what/why you’re doing all this, since it took some time to figure out what was doing what and why.