This is the message in the log file:

2015-06-17 22:50:00.984 ===== TRACE ===== NEW CONNECTED USER 'guest'
2015-06-17 22:50:01.140 ** ERROR ** ERROR **
2015-06-17 22:50:01.141 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-17 22:50:01.142 ** ERROR ** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition
2015-06-17 22:50:01.218 ** ERROR ** ERROR **
2015-06-17 22:50:01.219 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-17 22:50:01.219 ** ERROR ** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition
2015-06-17 22:50:01.296 ** ERROR ** ERROR **
2015-06-17 22:50:01.297 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-17 22:50:01.298 ** ERROR ***** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition

Thanks!

Clean browser cache.
Clean PHP cache.
Restart browser and try again 😉

Hi
I retarted server (Mysq, Apache) and the problem persist.

In log a see this:
2015-06-18 20:36:16.833 ===== TRACE ===== NEW CONNECTED USER 'admin'
2015-06-18 20:36:17.265 ** ERROR ** ERROR **
2015-06-18 20:36:17.266 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-18 20:36:17.266 ** ERROR ***** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition

In browser i see this:
ERROR : An error occurred on 2015-06-18 at 20:36:17

Hi,

Restarting Apache is not enough.
You should clean existing PHP sessions.
This is done eitheir using xAMP utility (if provided) of deleting files in PHP temp dir (it should be something like D:xampplitetmp
Make sure to delete all sess_* files and try again.

Hi babynus

Thanks again but i still have the problem.
I deleted sess* files and restar apache and it's not working. I have the same errors:
In log:
2015-06-19 07:55:25.697 ===== TRACE ===== NEW CONNECTED USER 'admin'
2015-06-19 07:55:25.921 ** ERROR ** ERROR **
2015-06-19 07:55:25.922 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-19 07:55:25.922 ** ERROR ** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition
2015-06-19 07:55:26.000 ** ERROR ** ERROR **
2015-06-19 07:55:26.000 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-19 07:55:26.001 ** ERROR ** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition
2015-06-19 07:55:26.078 ** ERROR ** ERROR **
2015-06-19 07:55:26.096 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-19 07:55:26.096 ** ERROR ***** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition

And in browser:
ERROR : An error occurred on 2015-06-19 at 07:55:26

Do you have another idea?

Thanks again.

Strange, it seems spl_autoload_register() fails on your system.
Which version of PHP are you using ? (PHP 5.2 or over is required)

Really strange.
PHP Version is 5.3.1

1) Try attached file : unzip it in /tool, to replace existing projeqtor.php
I don't think it will work, but it will avoied any side effect of other PHP applications running on your server.
It is to be sure.

2) Please detail exactly how, when and where you get the error message.
Some print screen may help.

Hi.

I download and install file as you toll me and restart apache, deleted session files in tmp.
start_page.jpg show initial access control page.
user_pass.jpg show access control with user and password set
I click in OK button an have the error shown in error_msg.jpg
I attached the log file too.

Regards.

Which version of xampplite are you using ?
I wonder if something may be missing in the "lite" version that could explain issue.

I will try to test with your version of xampplite.
Could you on your side try with another xAMP stack (easy PHP, or other) ?

I have XAMPP Lite v.1.7.3 with PHP 5.3.1
In my PC I have XAMPP 5.6.3 with PHP 5.6.3 but when I try to update from v.4.4.2 it fails. Then I try a fresh install in XAMPP Lite v.1.7.3 with minimal requirements OK, I think....

Regards.

I have XAMPP Lite v.1.7.3 with PHP 5.3.1

Thanks for this information, I'll try it.

when I try to update from v.4.4.2 it fails

What happens exacly ? What is the issue / errors logged ?

I installed XAMPP lite 1.7.3.
Installed new V5.0.0 (downloaded form site to be sure to get exactly same as yours).
Got to localhost/projeqtor : arrived at configuration screen
Changed only default password (to null), saved : OK, database create OK
Clik on continue : OK to login screen.
Enter admin/admin : Database correctly UPDATED to V.5.0.0
Log in as Admin : OK

So all worked fine for me.
I have no clue about what could happen in your case...
I must be linked to your configuration.
Maybe some Antivirus or Firewall blocking something.
Try and disable all to test....

Hi!
Now I'm try with v.5.0.1 and have this error message in log file.... 🙁

2015-06-25 08:33:05.014 ===== TRACE =====
2015-06-25 08:33:05.015 ===== TRACE ===== =====================================
2015-06-25 08:33:05.016 ===== TRACE =====
2015-06-25 08:33:05.016 ===== TRACE ===== DataBase actual Version = V5.0.0
2015-06-25 08:33:05.016 ===== TRACE ===== ProjeQtOr actual Version = V5.0.1
2015-06-25 08:33:05.017 ===== TRACE =====
2015-06-25 08:33:05.652 ===== TRACE ===== =====================================
2015-06-25 08:33:05.652 ===== TRACE =====
2015-06-25 08:33:05.653 ===== TRACE ===== DATABASE UPDATE COMPLETED TO VERSION V5.0.1
2015-06-25 08:33:05.653 ===== TRACE =====
2015-06-25 08:33:05.654 ===== TRACE ===== =====================================
2015-06-25 08:33:05.654 ===== TRACE =====
2015-06-25 08:33:10.709 ===== TRACE ===== NEW CONNECTED USER 'admin'
2015-06-25 08:33:10.906 ** ERROR ** ERROR **
2015-06-25 08:33:10.906 ** ERROR ** on file 'D:xampplitehtdocsprojeqtortoolprojeqtor.php' at line (125)
2015-06-25 08:33:10.907 ** ERROR ***** cause = main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition

Regards.