No output from cffunction?

i want to reaktivate an old cffunktion - but it dosent work.
So i test with a minimized Funktion - it also not worked.

cffunction name=“test” returnType=“string”>
5555555555555555555555555555555555555555EmailPruefenTemp = #EmailPruefenTemp# /cfoutput

cf_test variable1="" returnvar=“testergebnis”>

No Output

Lucee: current version
Server: Windows2012

Can someone help me?

regards Wilfried

that’s a very annoying quirk, try enabling buffer tag body output