Thanks for explaining me more , so i do not need WorkspaceRunner transformer .
i have very big workspace ,it is really slow when i let it to work with cache to continue work on it ,and sometimes after 1 hour ,i got message error running translation and it stopped and sometimes works great .
so i was thinking that my problem ,may be because of big workspace ,so i thought i wanted to deivde it to two workspaces better than only one .
where should i look for that causes error running translation ?
i have read in some articles that i should use FME Debug but i could not find the reason for the message error running transaltion .
Do you have any suggesitons for me ?
FME 2018
Thanks for help and reply .