Hi Mohini,
If you are using the .exe setup, the Robot will be in user mode and not as a service. This error occurs when the Robot’s username you’ve set in Orchestrator is wrong. Please double check the username of the Robot you are trying to Start a job on. To be sure, type in command line whoami. If your user is under a domain, you have to set in domain\username format.
ashokkarale
MD_Farhan1
Ajay_Mishra
postwick
Dheerendra_vishwakarma
Anil_G
chandreshsinh.jadeja
Gautham_Pattabiraman
vrdabberu
aravindbalineni123