"out of memory"

hi all,

i have a problem.

when i was doing the abap program, suddenly the reaction of everything became extreme slowly and after long time's non-response there's a popup message box came up saying 'out of memory'... then after a long time all the GUI windows were shut up automatically.....and such problems happened for some times...

i wonder where the problem lies.. it was something related to my PC or the server?

the condition is that the memory of my PC is large enough...

thank you.