Pipe schedule - Revit / Dynamo - different values

Im using sometimes Dynamo for Pipe/ducts scheduling. I have noticed that values from Revit and valuses also from Revit trough Dynamo into Excel are different (it does not Units issue). For small objects values of lenght are the same but only for small one. Had anyone the same Problem ?

Hi Pawel,

Is it possible to put here screenshots so that we can understand your issue.