Hi Vyacheslav,
it seems in v5.3 the system variable PROJECT_LOC is not there but it is there in v5.4
So a couple things to do next
option1 : move to v5.4 ... this is the latest version and I would recommend doing this by creating a full fresh installation of v5.4 into a new simple directory
option 2 : try using PROJECT_ROOT instead
Please keep us informed.
Best REgards,
Lisa