Problem of ALOS 2 Terrain Correction

Dear All,
Need a help:
I have the ALOS 2 data in SLC format. When I try to correct terrain with updated version of SNAP or s1tbx, the process done completed and successfully. But, the output data is empty with a black background. Is due to the software bug? Which software can do this process for me?
Any help would be gratefully appreciated.


is your data located beyond 60 degrees latitude? Maybe the automatic downloader doesn’t find any SRTM tiles in this region.