[SOLVED] Multiple object update -> Maximum execution time of 30 seconds exceeded

When i try to update multiple task information like priority information i show that all task selected were not updated
Log apache at the time of error indicates that maximum execution time of 30 seconds exceeded
[Tue Jun 27 12:55:10.279304 2017] [:error] [pid 51430] [client 192.168.0.122:34574] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/html/projeqtor/model/PlanningElement.php on line 598, referer: srvcentos01.quanta.local/view/main.php
[Tue Jun 27 12:56:18.576305 2017] [:error] [pid 51452] [client 192.168.0.122:34576] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/html/projeqtor/model/PlanningElement.php on line 1306, referer: srvcentos01.quanta.local/view/main.php
[Tue Jun 27 12:56:55.596308 2017] [:error] [pid 51472] [client 192.168.0.122:34579] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/html/projeqtor/model/PlanningElement.php on line 1954, referer: srvcentos01.quanta.local/view/main.php
[Tue Jun 27 12:57:31.492310 2017] [:error] [pid 51339] [client 192.168.0.122:34581] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/html/projeqtor/model/ProjectPlanningElementMain.php on line 378, referer: srvcentos01.quanta.local/view/main.php


I modify server ressources (2 virtual processors, 4096 memory) and modify php.ini to update max execution time to 120 sec

Now i try to create a recurrent meeting of 70 occurencies
I obtain an error message of network error and log shows
[Tue Jun 27 19:18:30.496886 2017] [:error] [pid 10788] [client 192.168.1.112:63073] PHP Fatal error: Maximum execution time of 120 seconds exceeded in /var/www/html/projeqtor/model/persistence/SqlElement.php on line 1963, referer: projeqtor.quanta-medical.com/view/main.php
[Tue Jun 27 19:20:44.239903 2017] [:error] [pid 10846] [client 192.168.1.112:63075] PHP Fatal error: Maximum execution time of 120 seconds exceeded in /var/www/html/projeqtor/tool/projeqtor.php on line 0, referer: projeqtor.quanta-medical.com/view/main.php

I there a possibility to optimize code source to enforce no limit to execution time where task can be long ?
NB : database is installed on same server that apache, i don't think that it can be a network error ...

If fact, if i reduce number of items selected, it works
But problem is that Projeqtor not send a message when timeout appear on multiple task update...
We think that's ok, but no. I know this problem, but not all my team.

About possibility of optimize, i wanted to say if you have a fast modification to suggest to me.
I understand that you have to know an error to work on it, and correct it

I'll wait for next release

Thanks