Failed to Read File 'C:\Users\Greg\AppData\Local\Ironclad Games\Sins of a Solar Empire\Mods-Entrenchment v1.01\Fleet\GameInfo\PLANETMODULE_PHASEORBITALCANNON.entity'. desired read bytes = 1133903872, actual read bytes = 599.what

what does the last part mean. i know which file it is referring to, but i don't know what the problem is

i was trying to give my orbital cannon a shield by the way, but every time i try to mod it, it minidumps

I also get the same message for other files, so what does this problem indicate?