Can't Open a VERY Large MP4 File?

[ShadowfaxSTF]

I just exported a 3 hour HD project from Premiere Pro CS3 using the MainConcept MPEG Pro Plugin (basically a plugin that basic H.264 compatibility) and the resulting file is 5.64 GB.

Naturally it seems nothing on my computer can open it. Xvid4PSP says "FFIndex: Can't Open [path]", AimOne MP4 Cutter "[path] is not an MP4 file", Handbrake "No Title(s) Found. Your Source may be copy protected, badly mastered or in a format which Handbrake does not support.", CCCP's Media Player Classic just sort of sits there trying to open, and MediaInfo just generically reports an MP4 container and file size with no other details.

Not sure if this is because large files are unsupported by these programs or whether it's genuinely corrupt.

Anyways, any advice? Maybe cut this up into smaller files? What do you think?

EDIT: My specs, in case it helps...
HP Pavilion Elite HPE-450t series
Windows 7 Home Premium 64-bit
Intel Core i7-870 quad-core processor [2.93GHz, 1MB L2 + 8MB shared L3 cache]
9GB DDR3-1333MHz SDRAM [3 DIMMs]
1.5TB 7200 rpm SATA 3Gb/s hard drive
500GB 7200 rpm SATA 3Gb/s hard drive
1GB ATI Radeon HD 5570

Cheers,
Daniel

[aedipuss]

sounds like a bogus file. export as something more useful if you plan on importing to another editor/encoder.

[ShadowfaxSTF]

What format would you suggest?

[aedipuss]

what's the project? what's the source material? what's the final product going to be?