His dudeness,
very strange that the original route as you posted does not work... Just for fun I tried a few FPL verification tools available, and it passes. But yes, I haven't tried it directly with IFPS...
Now, what about the below solution, how does your verification / flightplanning system see this one?
-N0456F280 MABES UJ32 MOREG UL47 ARBOS/N0459F310 UL47 IXILU UN853 GIVOR/N0260F260 UL47 GTQ/N0260F210 G21 MAKOT/N0260F090 Z818 MANEM Q762 BADLI DCT
Is it acceptable from pilot's view? (economy, profile...)