Thank you for your quick answers.
I did two more tests:
- as Andreas suggested me, I closed SNAP toolbox and reopened it, loading onlyt the interferogram I wanted to export.
The export step took only 17 minutes instead of 40’ before - I also used gpt.exe with an XML script I build, just for SNAPHU export.
It took 20 seconds !
I believe there are some weird behaviours with the SNAP toolbox GUI. Because it is not usually that long to export/import to SNAPHU. Whatever you do, the application always needs a huge memory chunk.
Could there be some issues around that?