Problem with linear movement

At the moment i cant run my routines with parameters.

easy to test:

#333 = 20
g0 g54 g43 z#333



 

Edit:
The error occurs on different ui, so it seems linuxcnc related. If other axis are affected, i dont know, because first z-movement lead to abort.
No matter if numbered or named parameter are used
Preview is working

What version of linuxcnc?

I didnt expect a hickup in the virtualbox can interfere functionality of linuxcnc. But after restart, i can not reproduce this problem in axis and flexgui. 
I have  version 2.7
Lucky its solved by itself.