The upgrade file was there. But when i click the upgrade option, it was automatically removed. After clicking upgrade it shows the error mentioned in my above screenshot. Then i check for files in the oc-admin folder, upgrade.php is missing. So I manually uploaded upgraded.php to the folder. Then the same issue is repeating. Somehow the upgrade.php is removed each time i click upgrade button.

@frosticek no reply?

The upgrade file was there. But when i click the upgrade option, it was automatically removed. After clicking upgrade it shows the error mentioned in my above screenshot. Then i check for files in the oc-admin folder, upgrade.php is missing. So I manually uploaded upgraded.php to the folder. Then the same issue is repeating. Somehow the upgrade.php is removed each time i click upgrade button.

100% correct. This happened to me also, a few months back. The file was missing, i had to manually put it there. But for some reason, after that it worked.

Had several other issues thought ....

@frosticek no reply?

Sorry, I do not think our osclass version can remove this file.
I remeber mindstellar had some uodates in class locations.

Try to remove evrything except oc-content folder and config.php, ten extract osclass zip

Tried it and still the upgrade.php is going missing after i click the upgrade button in admin backend.

here is the debug log


[02-Apr-2023 11:13:32 Asia/Kolkata] PHP Warning:  Undefined variable $html in /home/****/public_html/oc-content/themes/letgo/functions.php on line 1322
[02-Apr-2023 11:13:41 Asia/Kolkata] PHP Warning:  require_once(/home/*****/public_html/oc-admin/upgrade.php): Failed to open stream: No such file or directory in /home/****/public_html/oc-admin/index.php on line 196
[02-Apr-2023 11:13:41 Asia/Kolkata] PHP Fatal error:  Uncaught Error: Failed opening required '/home/*****/public_html/oc-admin/upgrade.php' (include_path='.:/opt/cpanel/ea-php80/root/usr/share/pear') in /home/*****/public_html/oc-admin/index.php:196
Stack trace:
#0 {main}
  thrown in /home/*****/public_html/oc-admin/index.php on line 196
[02-Apr-2023 11:13:52 Asia/Kolkata] PHP Warning:  Undefined variable $html in /home/****/public_html/oc-content/themes/letgo/functions.php on line 1322

When i click upgrade button after copying files as you said this happens. Please find attachment 1.png and then if i click anywhere, a blank page will come

[02-Apr-2023 11:33:11 Asia/Kolkata] PHP Fatal error:  Uncaught Error: Call to undefined function convertAlert() in /home/****/public_html/oc-includes/osclass/upgrade-funcs.php:275
Stack trace:
#0 /home/*****/public_html/oc-admin/upgrade.php(40): require()
#1 /home/****/public_html/oc-admin/index.php(198): CAdminUpgrade->doModel()
#2 {main}
  thrown in /home/*****/public_html/oc-includes/osclass/upgrade-funcs.php on line 275
[02-Apr-2023 11:33:22 Asia/Kolkata] PHP Notice:  Plugin js is missing the index.php file /home/****/public_html/oc-content/plugins/js/index.php in /home/****/public_html/oc-includes/osclass/classes/Plugins.php on line 124
[02-Apr-2023 11:33:22 Asia/Kolkata] PHP Notice:  Plugin css is missing the index.php file /home/****/public_html/oc-content/plugins/css/index.php in /home/*****/public_html/oc-includes/osclass/classes/Plugins.php on line 124
[02-Apr-2023 11:33:22 Asia/Kolkata] PHP Notice:  Plugin documentation is missing the index.php file /home/****/public_html/oc-content/plugins/documentation/index.php in /home/*****/public_html/oc-includes/osclass/classes/Plugins.php on line 124
[02-Apr-2023 11:33:22 Asia/Kolkata] PHP Notice:  Plugin images is missing the index.php file /home/*****/public_html/oc-content/plugins/images/index.php in /home/****/public_html/oc-includes/osclass/classes/Plugins.php on line 124
[02-Apr-2023 11:33:22 Asia/Kolkata] PHP Notice:  Plugin src is missing the index.php file /home/****/public_html/oc-content/plugins/src/index.php in /home/*****/public_html/oc-includes/osclass/classes/Plugins.php on line 124
[02-Apr-2023 11:33:28 Asia/Kolkata] PHP Warning:  require_once(/home/*****/public_html/oc-admin/upgrade.php): Failed to open stream: No such file or directory in /home/*****/public_html/oc-admin/index.php on line 196
[02-Apr-2023 11:33:28 Asia/Kolkata] PHP Fatal error:  Uncaught Error: Failed opening required '/home/*****/public_html/oc-admin/upgrade.php' (include_path='.:/opt/cpanel/ea-php80/root/usr/share/pear') in /home/******/public_html/oc-admin/index.php:196
Stack trace:
#0 {main}
  thrown in /home/******/public_html/oc-admin/index.php on line 196

You first need to replace all Osclass files with new one (manually, extracting ZIP).
Then check what's your Osclass version in database and make sure it's latest before using Mindstellar.
In your case you tried to execute code to upgrade from Osclass version lower than 2.4 ... seems that functions used there does not exists anymore.

all files including oc-content and config.php?

Please Tell me how to check osclass version in database.

Config.php does not exists in osclass installation.
Version is in t_preference table, section osclass.
Should be 390 in your case

Config.php does not exists in osclass installation.
Version is in t_preference table, section osclass.
Should be 390 in your case

yes. but if i replace config.php  and all files with v8+ then, it will ask me to install it from the start i think.

My motive is to upgrade to v8+ without starting fresh.

When i checked my database shows my version is still v5.1.2 please sceenshots attached

How can you replace config.php if it does not exists in installation package??
Version should be without DOTs.
Set it to 390 and try to restart upgrade.

woohooo!!! solved.. after changing the version to 390 it was successfully upgraded.
But  Tools>Upgrade Osclass is giving a blank page

Also the listings are shown in homepage but, when i click a listing, an error like "sorry but i can't find the page you are looking for" is showing

Try to disable friendly URLs and/or refresh their setting.