Unit Founded - 24 NOV 2014
In your arma 3 directory folder there is a folder thats named Dll, try deleting the files in there.
Deleting the dll folder is a brutal solution. To accomplish the same thing, add the line '-malloc=system' to your startup parameters OR, if you are using the Arma 3 launcher, in Parameters > Advanced > Advanced check 'Malloc' and type 'system'
also if you are going to delete files in your directory> Dll, do NOT delete the readme everything but the readme
How much ram do you have
i only got this issue when using real light