Hi Shivanand Aravat, Thank you for posting query in Microsoft Q&A Platform.
Kindly check is your Sink dataset have schema imported or not, If not, consider importing same if its applicable. When you parameterize dataflow, try to import schema in source transformation as well by hitting,
Import Projection
under Projection tab of Source transformation.
Hope this helps. If not, please share more details and screenshots of your source and sink transformations and also datasets of source and sink.
Please consider hitting Accept Answer
button. Accepted answers help community as well.