Script LOG

Sentinel 3 OLCI - path to .SEN3 folder:

Specify path to satellite image : /path/to/OLCI/S3A_OL_1_EFR____20170311T100905_20170311T101205_20170312T153441_0179_015_179_2160_LN1_O_NT_002.SEN3
Satellite product opened:
S3A_OL_1_EFR____20170311T100905_20170311T101205_20170312T153441_0179_015_179_2160_LN1_O_NT_002.SEN3
Some stuff...
You selected: ['Oa01_radiance']

Sentinel 2 - path to .xml:

Specify path to satellite image : /path/to/S2/S2A_MSIL1C_20170311T103011_N0204_R108_T31TGL_20170311T103014.SAFE/MTD_MSIL1C.xml
INFO: org.esa.s2tbx.dataio.s2.ortho.S2OrthoProductReaderPlugIn: Building product reader - EPSG:32631
WARNING: org.esa.s2tbx.dataio.metadata.GenericXmlMetadata: Metadata: the path to element [metadata_level] does not exist
WARNING: org.esa.s2tbx.dataio.metadata.GenericXmlMetadata: Metadata: the path to element [granuleidentifier] does not exist
WARNING: org.esa.s2tbx.dataio.metadata.GenericXmlMetadata: Metadata: the path to element [bandid] does not exist
INFO: org.hsqldb.persist.Logger: dataFileCache open start

This last bit is the error caught from my function:
Traceback (most recent call last):
  File "main_test.py", line 24, in <module>
    sc_im = sn_ops.open_product(in_im)
  File "/my/function/sn_ops.py", line 16, in open_product
    raise RuntimeError('Error: SNAP cannot read specified file!')
RuntimeError: Error: SNAP cannot read specified file!

For a Tiff DEM, I ony get:

INFO: org.hsqldb.persist.Logger: dataFileCache open start