This is a question for members . utilizing FsPx with PMDG-400X combination TopCat:Every time I attempt to take-off, FsPX " No refueling permitted after FsxP activated" appears. Sometimes it freezes the FSX or allows me to click "close". Then suddenly two engines loose power 400 feet above and thats the end of the flight.I like the FSxP utilized with PMDG747X. Whatever I do, I cannot stop this from happening. Here is my fueling procedure:1- I make all W/B and fuel calculations with TopCat. I click to send the Fuel/Payload to FSX. I open PMDG "Fuel" tool, insert the right figure. click Apply and click ON. Correct figures appear in FMC.2-I open and check FSX Fuel/Payload screen; all numbers are correct.3-I prepare the FMC4- I activate FsPX and make sure all numbers matches TopCat figures.I initiate the take-off, 747 V2 speed is reached and start to climb. Close to 400, FSX stops. Screens appears with warning "No refueling allow after FsPX activated." I clicked close and two engines lose all power, then I stop the flight.Many times I disabled FsPX "Fuel, but still warning appears.Will you please advise if you have been utilizing FsPX with PMDG-747-400XI have asked to FSXP forum but have gotten no responses.Thank you

This is a problem in FSP. Mainly because it is logging starting fuel to make sure none is added since it see's it as a cheat. 1st thing is make sure you disable FSP fuel (this is recommended on their own site somewhere within the forum). Next, do not start FSP until you have made your fuel changes and all fuel is final.Even then, once you take off you'll still get the annoying prompt. If you want to get this prompt out of the way prior to take off, you can just go into the PMDG fuel options after FSP is loaded and add 100lbs or something small. When you do this you will get the prompt right away and won't have to worry about it later. You might be experiencing some system crash from getting the prompt window when you do so it's worth a try. I never seen it shut down any of my engines but I also have always kept FSP's fuel off.* I can't speak for Tomcat since although I do own it, have only used it for Flex speeds on the MD-11.Hope this helps,

This is a problem in FSP. Mainly because it is logging starting fuel to make sure none is added since it see's it as a cheat. 1st thing is make sure you disable FSP fuel (this is recommended on their own site somewhere within the forum). Next, do not start FSP until you have made your fuel changes and all fuel is final.Even then, once you take off you'll still get the annoying prompt. If you want to get this prompt out of the way prior to take off, you can just go into the PMDG fuel options after FSP is loaded and add 100lbs or something small. When you do this you will get the prompt right away and won't have to worry about it later. You might be experiencing some system crash from getting the prompt window when you do so it's worth a try. I never seen it shut down any of my engines but I also have always kept FSP's fuel off.* I can't speak for Tomcat since although I do own it, have only used it for Flex speeds on the MD-11.Hope this helps,

Dan,Thanks for your reply. I will try to add 100lbs and let see what will happen. I cannot understand why FsP cuts of the fuel flown to two engines????Regards