[SR-Users] result of param.value transformation when param does not exist?

[Juha Heinanen]

Daniel-Constantin Mierla writes:

> Was the value of the variable null or not a string? If not, was there
> any parameter in the value?

the inner transformation was uri.headers transformation on an uri that
did not have headers.  the outer one was param.value transformation.
when i then tried to assign the final value to a variable, i got the
error message.

-- juha