ultracom

Great to hear that problem have been solved. Please rate the answer which is useful. Thanks.

I agree with bellini13. Usually common problem is execute on server site not enough long running process. Try on your own localhost PC as server, it will solve your problem if you set your localhost php or apache execute time correctly. If you using hosting provider, please contact them to change the number of execute time for more longer time.

First make sure must manual make your own backup database and whole folder of your live shop. Try fresh install 1.7.2.4 version at your own localhost pc, when everything complete install, go to theme folder, copy that original "classic" folder and paste it to your live page where your location of "theme" folder inside got "classic" folder, just replace it. Then retry again to upgrade your shop to latest 1.7.3.0 by 1-click upgrade.

1- update all module to latest version. 2- switch theme to classic. 3- go to advanced performance > performance > clear cache. 4- run 1-click upgrade. After done upgrade, remember to switch back to your own theme and clear cache again. Above step is work for me.