Error building the project

Hi,
I finally finished my unity project and when I tried to build it I got:
Exception: Error building Player: Extracting referenced dlls failed.
why this error is occuring and where should I place the needed dlls, I placed them in the assets folder but that didn’t work.
And there is another thing when I play the game and I get to the last level it outputs a malloc failed() error and the program shuts down what could be the problem?
Please help, I need to deliver the project soon.

Your using code you don’t understand and your delivering a project? Something is wrong here.

Get in touch with whatever plugin’s your using, you haven’t implemented their solutions correctly or their solutions are bogus to begin with.

No,
My game is working correctly and there is no bug but when I build it they’re telling me that the dlls could not be loaded or extracted…
Plus I wrote all the codes and I did understand everything.

Hi,
I did it it’s just the api compatibility it must be 2.0 for the big size games…