File is locked by FileOpen()

I remember mql4 community was closed in favor of mql5. Didn't know they have re-activated it again!

So I posted my question on mql5 forums :

MQL4: Sharing file between two MT4 on the same PC


I checked a couple of topics for the same issue, but they didn't solve my problem. Any help would be appreciated.

Read up on FILE_COMMON
GumRai:
Read up on FILE_COMMON
A little more explanation please :)
z3d:
A little more explanation please :)
Why? Everything you need (the path) is mentioned there!