Hello Oouassim,
Thank you for reporting about that.
Looks like it can be reproduced even in our samples.
I added it as a bug in our tracker. It will be fixed in the future. I cannot give you an ETA, but I will notify you when the fix is ready.
Hello Ouassim,
It might be fixed earlier, but I can’t promise that.
Update:
Looks like, the bug there is not only that Gantt doesn’t change the dates, but that it doesn’t inform users about constraint dates, and that the behavior in the lightbox is different from the manual drag.
When autoscheduling is enabled Gantt sets constraint dates to a task when you move it in the timeline. Linked tasks have “ASAP” constraint by default: https://docs.dhtmlx.com/gantt/desktop__auto_scheduling.html#backwardscheduling
So when you try to change the start_date in the lightbox/inline editor, it violates the constraint rule, so Gantt doesn’t allow changing that. If you change the constraint type to “Start No Earlier Than”, you will be able to move the task to a new date.
So now, as a workaround, you can add the constraint section in the lightbox sections:
I am using different calendar to each task. Each task is having different non working days, if i will do auto schedule with relation ship start to start and start to finish. Auto schedule is not working as expected. We have created a snippet. http://snippet.dhtmlx.com/64570036d
In the above snippet, Task #2.1 has 3 non-working days, Task #2.2 has 2 non-working days
Even though Task #2.2 is connected to Task #2.1 with a Start to Start link, the start date of Task #2.2 is shifting by one day later than the start date of Task #2.1