If you go on to your task manager > Details > Memory
You will be able to see how much memory is using while you are on TLOPO,
Porting while you crash is mainly because of memory leak.
To solve your problem, if your memory is over 1.5k ish,
you will need to relog your TLOPO, have a person on board your ship therefore you will not lose ur loots etc after relogging.
by 1.7k your game will crash so always relog before porting is a good idea.