Hi @arsalane1978!
First off, do you have a directory on your machine at /data? You can check by running:
$ ls /data
If you see something like ls: /data: No such file or directory, then you will first need to make the directory:
$ mkdir /data
Then, you can export that environment variable:
$ export TMPDIR='/data'
You can check that the variable is set by running:
$ echo $TMPDIR
It should display /data. If not, you will need to export it again.
Give that a shot and please let us know how it goes! Good luck! 