resources costs per month report provide wrong results

Ticket #911 recorded.

I'll try and reproduce.
If you can post a print screen or pdf export pointing out differences, it may help.

Hi,

I have the explanation of differences :
- "cost synthesis per activity" retreives costs from activities (real and left) : it is always up to date
- "resource cost per month" retreives data from planning : real costs, months by months, as entered by reosurces, and left work, months by months, as planned by Planning process.

If left work is updated on some tasks, these two reports will display differences, as long as planning is not run again.

Run planning calculation will resync "planned" and "real" values.

I would like to create some custom reports, is there any documentation to allow me to avoid doing stupid errors on this?

No, there is no documentation.
You will find some information in the forum, that will help you to start.