Stop Workflow if Total is Not Met

[hellyars]

I want to build a safeguard into my workflow that stops it if the sum of the records does not equal X.

In the example...

X = 100

The sum of the records is <100, so I want the workflow to error and NOT pass the records to the Transpose Tool unless they sum to 100.

[hellyars]

I came up with this temporary solution, where I append a Delta field and then pass it through a Filter set to 0.

But, I don't want to append a Delta value to thousands of records.