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[supermanPunch (Arpan)]

Hi @VamshiKrishna_Aluvala ,

Have you checked the below Similar post that has the same error being described :

Orchestrator Publication 2019: Object Reference not set to an instance of an object

If this built using an older version of the UiPath REFramework, the issue may be any files that contain %20 in the filename. Under the Documentation folder, there is a REFramework%20documentation.pdf that could be causing the null reference error. This also applies for files that have spaces in the filename (or %20). See the resolution in the thread below: