Follow the following steps and Magma throws an error:
Add a magma modifier to a PRT Loader
Add a float
Check “exposed”
Add a Blend node
Connect float to Blend (Value at 0 input, not sure if it matters)
Change the float to a vector
Tobbe
Did that, nothing bad happened.
In the future, please provide the outcome you see (best including a screenshot), and the exact version of Krakatoa you are running (since the bug might be fixed in my build).