have you run snaphu correctly?
First, you need an unwrapped product (one *.img and one *hdr image)?
Second, a reference image (interferogram before unwrapping) in DIMAP format must be opened in SNAP.
If both are present, you can run the SNAPHU import as described:
1-Read-Phase (this is the reference file, usually the one before the unwrapping)
2-Read-Unwrapped-Phase (here you chose the hdr file of the unwrapped phase created by snaphu)
