Thank you very much Sir for sharing your experience, and for your precious help,
untill now i checked those web sites and i downloaded the module "account_consolidation" and it seems that it is installed correctly,
but i'de like to explain my situation, i have a parent company which is in morocco and i have two childs the first one in france and the second in india as you they are different countries and of course they don't have the same chart of account, the parent one uses the moroccan chart of accounts , the first child uses the frensh chart of account and so forth so on, i would like to make the consolidation in the moroccan chart of account, i googled the topic and i found that i have to create a virtual chart of account for every company , i don't know if i have to generated these Virtual chart of account manually o i have to create manually, and is itt necessry that these charts has the same structure (because the moroccan , frensh, and indian chart of account are differents)
thank you very much Sir
Best Regards