grass - Using r.reclass.area.lesser in QGIS?

I want to reclass small areas in QGIS 2.18, but it seems to fail calling the algorithm in GRASS GIS. The interesting lines from the Log of the tool:

...
C:\PROGRA~1\QGIS2~1.18\bin>g.region n=5478291.27701 s=5058891.27701 e=2350688.13497 w=1982088.13497 res=100.0


C:\PROGRA~1\QGIS2~1.18\bin>r.reclass.area input="tmp1521273631216" mode=lesser value="60" output="outpute5c09076262546938021350e8d68b972"
--overwrite  Der Befehl """" ist entweder falsch geschrieben oder  konnte nicht gefunden werden.

...

(It says that command """" is written wrong or not available)

Any ideas to fix that or to use another tool in QGIS for this task?