Error message submitting extension to extension wharehouse

I found alone a solution to my problem; i explain it for somebody who could face the same problem…

the error message does not help; the problem was that the directory contained too many files (3286)… and sketchup submitting process could not manage so many files in one directory

reducing the options of the extension, i reduced the number of files in the directory to 244, and it passed the first step of the submission