PPCS6 Render freezes at 100% and never finishes

Hi,

I'm trying to render a 42 mins long sequence in PPCS6 and the render process goes fine until it reaches 100%. It gets stuchk at this point and it never finishes the render. I tried twice but it always gets stuck at this point.

The export settings are:

Codec: H.264

Format: MP4

I already rendered previous projects with these output settings and similar length. I don't understand what's going on.

Can you help me?

Thanks.