Problem with restart (crash) FS when I programming FMC PSS 757

[FOD 23]

Szymon,I have now flown your route many times and, as I thought, the kind of freeze you are getting has been reported before. The problem is that, whilst it is easy to force a freeze, it is almost impossible to identify the exact cause. I have flown the route several times with no freeze even though I repeatedly changed the speed/ht restrictions at the hold. On the other hand, other times just setting the first spd/ht will cause a freeze {and this does not only apply to your route}Its regretable that PSS never got round to a fix; however, the following seem to help in delaying the problem and enabling you to complete a flight;1. If possible, input the hold etc with its restrictions whilst programming the FMC and before you "EXE" for the first time.2. Once you have executed the route, every time you make a change which brings on the "EXE" light, press to clear the light before you do another change.Hope this might help - if anyone else has looked at this, please let us know.John Rooum

[Guest Imek]

John,I was try first all is right in page LEGS but now I have freeze when I insert Cost index in PERF INIT page :(When I try second I still have freeze when I insert spd/alt for point FUN I'am now very frustrated by this error :(