When i'm exporting a video it says "Movie compiling error, unknown error"

Question

in the export menu i changed the formats and presets also but nothing helped. what should i do? is the problem with my pc or  premiere pro? i have the latest premiere pro ( Adobe Premiere Pro CC 2014) downloaded form the Creative Cloud app.
My PC specs,
OS - Windows 8.1 64bit
RAM - 4GB DDR 2
Processor - Intel Core 2 Duo 2.66GHZ
VGA - AMD Radeon HD 5450 (1GB)
HDD - 160GB
Please give me an answer quickly because i like this software so much and this problem bothering me!

Answer 1

When you render a Pr sequence in the standalone version of AME, it actually loads Pr in the background to do the file parsing but in a special 'headless' mode that omits a bunch of stuff (e.g. the user interface classes). When an encoding job works in AME but fails in Pr, it strongly indicates a memory management bug is in play.
I agree the 'unknown error' error is stupid, but some of the encoding class libraries simply don't tell their parent process why they stop. In the case of the H.264 DLL, it throws a low-level exception - a fatal error which isn't "translated" into a meaningful string to display to the user. In an ideal world, programmers should ensure that every exception handler they write has a translator, but that assumes they know the error is going to happen and they've bothered to wrap the offending code in a try-catch loop. If it's an out-of-the-blue fault such as divide-by-zero in the normal sequence of code, it just kills the process stone dead. In effect the parent process doesn't have a better idea what caused the error.
The class responsible for the exception is usually recorded in the error log file - see Media Encoder Help | Working with log files - but to diagnose the cause Adobe needs a stack trace from the moment of failure, and AME doesn't save one.