how can i correct this error , object reference is not set to the instance of an object
You use a variable that has not been initialised before
tried that , not helping
Run on debug, it will fail on the activity which produces the error
In case of any Duplicated variable it may occur!
Check Variable panel for any Duplicated variable if exists delete that!
Kindly check if you are passing argument /using variables and the value is not initialized/not assigned.
Ex types: string, datatable, datarow, datacolumn etc
It will help if you can share your screenshot of workflow and tell us which activity you are getting this issue
Object reference is not set to the instance of an object This error occurs when you are not passing the arguments correctly or if the variable is getting null values