Hi @ethompson ,
The issue is with old value calculation. You are setting empty incase oldValue is not available & then you are splitting it which is causing error. Set the old to a default value & try. Below is working for me.
"old": {
"attributes": {
"input": {
"attributes": {
"values": [
"$oldValue",
"NA"
],
"ignoreErrors": "true"
},
"type": "firstValid"
},
"delimiter": " ",
"index": 0.0
},
"type": "split"
},