I have a relative button(New) based on which i have to select the actual button for file upload. but when running in attended mode this is working but when running in unattended mode it is not working any suggestion would be helpful .Also anyother info from my end i can provide for investigating
Can you please check the input mode for that click activity, you have given the send window messages. Make sure that it has simulate type and please check with that
In the right side properties panel at the bottom you can see their is an option as send window message and simulateclick. So, there uncheck the send window messages and check the simulateclick as true.