After struggling to access enroute charts via Firefox (the Java script wouldn't load), I tried IE8 and suddenly I was able to consult the enroute charts to resolve validation problems. I'd spent quite a bit of time trying to validate a route from LEMD to EGLC but was unable to do so until I noticed an altitude restriction on the departure route from LEMD.
SIE UN858 DGO UN867 BLV UP87 MOKOR UN867 KOKOS UN863 DIKRO UZ273 NEVIL M189 WAFFU
After adjusting the altitude range to 245-330, it was validated! My previous attempts had focused the errors on the final legs of the route and it's hard to understand how the adjustment of the lower flight limit in Spain would resolve the problems trying to get to NEVIL and WAFFU. Anyway, having a new tool will make the challenge more interesting!
The key was using IE8 rather than Firefox.
Access to enroute charts makes it easier!
Moderators: Michal Rok, nemesis19