KSP 0 Parts bug?

[KerbalKid]

So... i decided to go on the launch schedule and make satellites from the schedule

but when i created the satellite for my Ariane 5 i went to my Falcon 9 satellite and take a

satellite from there but when i went to my Ariane 5 save with my first satellite i created

It just said this 0 parts in 8 stages and when i try to open it, it does the normal you can launch it and save it yatayatayata but when i click

the launch button it says Craft Size Unknown! so i decided maybe it was just a glitch

and i exited the VAB and exited to the main menu and went back into the save and i went

back into the VAB and it still said 0 parts i even closed ksp and returned to the VAB it still says this! is there any way i can fix this? also i did use mods on the craft like tweakscale and infernal robotics

[ortyblz]

I've run into the same problem, and posted here.  I believe this is a craft file corruption since the game runs smoothly after exiting the VAB, or even after loading other craft in the VAB that utilize the same mods (with the only exception being UKS parts on the ship that is broken, I believe).  But I haven't ruled out everything.  I also have Tweakscale but not IR on my craft.  Is this an issue with only one of your crafts or more?  Were you able to load the craft in the VAB and edit it?  I don't have a solution for this.  Anyone?