Bad server response when upgrading

[livewire]

Hi

Im trying to upgrade using EspoCRM-upgrade-4.2.7-to-4.3.1.zip and it shows as uploading, after about a minute stopps and nothing happens.. no upgrading

But when i check in firebug, it gives the below error

Bad server response:
 .setupAjax/<(event=Object { type="ajaxError",  timeStamp=1490128174224,  jQuery214082799648714008=true,  more...}, xhr=Object { readyState=4,  status=200,  statusText="OK",  more...}, options=Object { url="api/v1/Admin/action/uploadUpgradePackage",  type="POST",  isLocal=false,  more...})espo.mi... > eval (line 535)
  n.event.dispatch(a=Object { type="object"})espo.mi...1979374 (line 3)
  n.event.add/r.handle(b=Object { type="object"})espo.mi...1979374 (line 3)
  n.event.trigger(b=Object { type="object"}, c=Object { type="object"}, d=Object { type="object"}, e=undefined)espo.mi...1979374 (line 3)
  x(a=200, b="OK", f=Object { type="object"}, h="Date: Tue, 21 Mar 2017 2...ntent-Type: text/html\r\n")espo.mi...1979374 (line 4)
  .send/b/<()espo.mi...1979374 (line 4)

[TABLE="cellpadding: 0, cellspacing: 0"]
[TR]
[TD] [/TD]
 			[TD]console.error('Bad server response: ' + xhr.responseText);[/TD]
 		[/TR]
[/TABLE]

Also is there a manual way to upgrade without using the upload?

[tanya]

Hello
Check espocrm log file (data/logs) to know the reason of error

this can helps you http://forum.espocrm.com/forum/insta...de-my-espo-crm

[livewire]

Hi

My error logs has no errors....

Is it possible to just upload the files inside the upgrade folder and run the installer to upgrade?

if i do a fresh installation of the latest version of Espo and drop that tables from that database and import all the tables from the 4.2.7 backup will it work?

[tanya]

if i do a fresh installation of the latest version of Espo and drop that tables from that database and import all the tables from the 4.2.7 backup will it work?

I don't think so

Can you work with your espocrm instance now? If yes - what is the version in About?