rc5 to 2.0 final stuck at upgrade step 19

[stanaca]

rc5 to 2.0 final stuck at upgrade step 19
Executing: "Create a repository for the javascript files from Simple Machines..." (19 of 42)
Error!
Server has not responded for 30 seconds. It may be worth waiting a little longer or otherwise please click here to try this step again

help required. my large forum is on Maintenance mode

[kat]

It may be worth waiting a little longer or otherwise please click here to try this step again

Did you try waiting?

[stanaca]

i closed the upgrade window, then opened again and resumed from same step and it's worked.
my forum is upgraded now