So I've made many gifs with photoshop before. I basicaly render out a .png stack from After effects, then import it into Photoshop as a sequence. The pngs I rendered out are at 1024 x 768, which is the standard Power Point slide dimensions.I do not render out more than 500 frames, but just to be on the safe side I deleted the first and last frame. I' musing adaptive, noise, no transparency dither, transparency unchecked, interlaced unchecked, 256 lors,
This has worked just fine for me several times before, but this time though i keep getting an error message. It gets about 3 fourths of the way though and says:
"Could not complete this operation. An unknown error has occured."
I have closed and restarted Photoshop with the same results. I have rebooted my laptop with the same results. I have re-rendered the png stack out of After Effects, with the thought that one png might be corrupted. Still the same results. Anyone have any idea what might be going on here?

I didn't find the right solution from the internet.

References:
http://www.techsupportforum.com/forums/f159/photoshop-keeps-giving-me-error-messages-when-making-a-gif-11642016451.html

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