Opening S2 in Snap 4.0 - error

Optical Toolbox
#1

Hey there,
I have already used S1 data in SNAP successfully.
Now I installed a newer version of SNAP (4.0) and want to open S2 files (the *.xml within the *.SAFE).
I get the following error: ‘java.lang.StackOverflowError’ trying the same on 2 different machines.
Is there anybody who has encountered the same problem? Anybody with a solution?
Thanks a lot
Esther

#2

Have you also installed all module updates?
If you go to Tools --> Plugins in the menu, you can see if there are some available.

#3

Thanks for that hint! Yes I did now but still encounter the same problem.

#4

Is there more exception text available? Maybe if you click on the red top sign at the lower right.

#5

Yes there is:
‘java.lang.StackOverflowError
at org.esa.s2tbx.dataio.$Proxy45.GetShortPathNameW(Unknown Source)
at org.esa.s2tbx.dataio.Utils.GetShortPathNameW(Utils.java:52)
at org.esa.s2tbx.dataio.Utils.GetIterativeShortPathNameW(Utils.java:86)
at org.esa.s2tbx.dataio.Utils.GetIterativeShortPathNameW(Utils.java:114)’
and then the last row repeated several times.

#6

and if I go into one granule and try to open the xml there from ‘Open Product’, the following error pops up:

‘java.lang.NullPointerException
at org.esa.s2tbx.dataio.VirtualDirEx$VirtualDirWrapper.isCompressed(VirtualDirEx.java:381)
at org.esa.s2tbx.dataio.readers.BaseProductReaderPlugIn.getDecodeQualification(BaseProductReaderPlugIn.java:79)
at org.esa.snap.rcp.actions.file.ProductOpener.lambda$getPluginsForFile$153(ProductOpener.java:262)
at java.util.Iterator.forEachRemaining(Unknown Source)
at org.esa.snap.rcp.actions.file.ProductOpener.getPluginsForFile(ProductOpener.java:261)
at org.esa.snap.rcp.actions.file.ProductOpener.openProductFilesCheckOpened(ProductOpener.java:217)
at org.esa.snap.rcp.actions.file.ProductOpener.op’
…

#7

I remember such problem from an old version. SNAP 3 or so.
Could you try to dele the .snap folder in your user home. and if your on Windows also the directory
{USER_HOME}\AppData\Roaming\SNAP
AppData is by default hidden but you can enter it by directly entering it in the address bar.

Afterwards you need to install the module updates again.

#8

I got it now:
Did as you said, restarted the application. Now restarted the computer and finally found the problem:
I had the data located on a network folder. If I copy it to my local, SNAP works fine.
It’s a pity because working from local makes things complicated. But I guess there must be a solution in the office here, so I don’t want to bother you here.
Thanks a lot for your help! Now I have a completely up-to-date version of the toolbox and am happy about that.
Many greetings, Esther

#9

There is also the path problem on windows. It should not be longer then 250 characters.
But an update is on its way…

#10

Now, it also works on the network after renaming the SAFE file to ‘test’. OK, interesting - I will wait for the update.
Thank you, very helpful!

#11

In most cases the majority of the processing time is spent on I/O, which makes reading/writing from a network-drive usually a bad idea. This is also why a SSD is a much better choice than a HD for data processing with SNAP…

#12

Thanks for that hint. I will consider it in future use.