Hi!
I recently bought PMDG 737NGX and AIRAC 1307!
I did a testflight from ESMS to ESSA. The toute I was supposed to fly was: NEXIL N851 MIKNA Z226 NILUG

I typed in NEXIL, M851 and MIKNA into the FMC. But then when I try the write Z226 it says "invalid entry"

 

Any ideas?

where do you enter those?

In the legs page or on page 2 of the RTE?

it needs to go in the RTE page 2 as in.
DCT        NEXIL

N851       MIKNA

Z226       NILUG

 

On the VIA tab you enter the airways

On the TO tab you enter the fixes.