I'm attempting to update a value in a sharepoint task after collecting data from a user after it has been completed in sharepoint designer. What I am doing is creating a "Collect Data from a User Task" this returns an ID for the task that was completed and I output that to a workflow variable. The next step I'm attempting to set a value in the Task that was completed. From my understanding I should be able to use this ID to perform a lookup on the task list using the ID that I recieved by collecting the form. Everytime I attempt to do this though it fails in error with a Description saying "Error updating a list item". Does anyone know why this doesn't work?