Run Script template processing script Table 1. Run Script processing script Field Description Processing script Script that the activity runs. Variables Input variables that are available to use as building blocks in the input process script. Click the arrow above the field to open the variables list. Click an item in the tree to add it to your script in the appropriate syntax. The list displays input variables you passed into the activity on the Inputs form. All activity variables added in the Inputs form are read-only and are expressed in the processing script with this syntax: activityInput.variable.