Object reference not found

Help
1

I’m getting error in my workflow (object reference not set to the instance) can anyone help me with that ?

2

Some of the value in your workflow is passing null or empty value.

Regards,
AK

3

the problem is when im try to run main file then only the error is persists when i run only selected workflow it working properly

4

Then this should be because of Invoke variable passing to other workflow. See the In/Out Property of that variable. Some where it would pass as null or empty.

Regards,
AK