hi all, new on PMDG 737 NGX, i've tried several times to save a route as co route in FMC but it still tell me INVALID ENTRY... does anybody can tell me the procedure to do it ....please thanks for prompt answerthanks for coop

Make sure you run your FSX as administrator.

ok, so i restart my fsx as an admin, then after choosen an 738 from pmdg and after waiting the IRS alignement, I enter the route as follow : LFML to LFLL , SID MTL1C MTL STAR MTL2C Back to the first page of route, before activate push on the save button this last turn to confirm , repress to confirm and nothing happen. Then i give a name to this route and he told me INVALID ENTRY ...HELP ME please ...

I have never given a name to my routes. The FMC should generate a default name like EGBBEGPH01.