Hi emmaadiosyahoo,
ERROR: PROC ARBORETUM needs at least 8258396524 bytes of RAM memory for this problem. Only 3408015360 bytes available.
The procedure ARBORETUM needs at least 8.26 GB of RAM in order to run but you only have 3.41 GB of RAM (running on a toaster?). If you're running it on a server, try to get a more powerful node. If you're running it locally ob your machine, try to stop other processes (programs like e-mail etc) and allow SAS to use more of your RAM.
Alternatively you can try to load a subset of your data and explore that.