Eh?! Saving/naming 744 FMC flightplan - this is weird (or normal?)

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I built my first flightplan in the 744 FMC yesterday from WMKK to WMKL and saved it--or so I thought--by going to clicking on RTE > RTE COPY. I was then unable to find it in the PMDG flightplan folder with the hundreds of pre-built PMDG flightplans afterwards. On closer inspection, I found it had been saved in the PMDG flightplan folder as "-.rte"I then renamed the file manually as WMKKWMKL001.rte, went into the FMC, clicked on RTE > CO ROUTE and entered the whole name string and voila, it re-appeared in the FMC.But this is weird. I thought that the FMC automatically names the flightplan fully and properly, based on the departing/arriving airport names and according to the PMDG protocol.Did I do something wrong or what's going on here?Appreciate guidance, thanks!Jonathan

[Tabs 2,790]

Hi Jonathan,Can you post the full route, I'd like to try this...

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Yeah, I shall post it tomorrow as I have to put it onto this internet connected PC from my non-internet FS9 PC.Jonathan