SNAP 4.0 GPT infinite loop problem


I update to SNAP 4.0 in linux recently, and when I run GPT from the commandline to run the graph “TOPSAR Coreg Interferogram IW All Swaths.xml”, it loops just like a infinite loop, and keeps running and running and no end.

It seems that there are some problems with DEM, but I can’t find why, could you help me?

Many thanks!