Instrument out of RAM during long tests

Hi there !

Here is my problem : I have right a “long” test (10 minutes), but in the middle of the test, instruments not respond and another instance of instruments is created, see the picture :

If I let it like this, the RAM will continue to increase :frowning:

And sometimes, instruments is OK till the end, but the RAM is full again, but continue to respond.

Any idea why I get that ? Do you have same behavior ?