GPT Error: No product reader found

snap
#1

Hi,

I am trying to use the gpt command to run graphs on my mac, though I am not having much luck.
This is the error I receive. I got it to work last night, but I am unable to replicate that success, and I am not sure what changed.
I’ve tried with the default Calibrate.xml and a subset graph I made myself, so I don’t think its a problem with the graph.

INFO: org.esa.snap.core.gpf.operators.tooladapter.ToolAdapterIO: Initializing external tool adapters
INFO: org.esa.s2tbx.dataio.gdal.activator.GDALDistributionInstaller: No distribution folder found on Macintosh.
org.esa.snap.core.gpf.OperatorException: No product reader found for ‘/Users/rbiessel/hawaiiSubset.xml’
at org.esa.snap.core.gpf.main.DefaultCommandLineContext.readProduct(DefaultCommandLineContext.java:57)
at org.esa.snap.core.gpf.main.CommandLineTool.readProduct(CommandLineTool.java:521)
at org.esa.snap.core.gpf.main.CommandLineTool.addProduct(CommandLineTool.java:466)
at org.esa.snap.core.gpf.main.CommandLineTool.getSourceProductMap(CommandLineTool.java:454)
at org.esa.snap.core.gpf.main.CommandLineTool.runOperator(CommandLineTool.java:295)
at org.esa.snap.core.gpf.main.CommandLineTool.runGraphOrOperator(CommandLineTool.java:284)
at org.esa.snap.core.gpf.main.CommandLineTool.run(CommandLineTool.java:188)
at org.esa.snap.core.gpf.main.CommandLineTool.run(CommandLineTool.java:121)
at org.esa.snap.core.gpf.main.GPT.run(GPT.java:54)
at org.esa.snap.core.gpf.main.GPT.main(GPT.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.esa.snap.runtime.Launcher.lambda$run$14(Launcher.java:55)
at org.esa.snap.runtime.Engine.runClientCode(Engine.java:189)
at org.esa.snap.runtime.Launcher.run(Launcher.java:51)
at org.esa.snap.runtime.Launcher.main(Launcher.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:62)
at com.install4j.runtime.launcher.UnixLauncher.main(UnixLauncher.java:57)
Error: No product reader found for ‘/Users/rbiessel/hawaiiSubset.xml’

Anyone have any ideas?

#2

It seems something is wrong with call of gpt.
I guess hawaiiSubset.xml and Calibrate.xml are graphs but gpt tries to read them as a product.
Can you show the complete call to gpt?

#3

I’m entering this command from within a nodejs app, but I get the same result when I use it the terminal.

/Applications/snap/bin/gpt gpt /Users/rbiessel/hawaiiSubset.xml

And here’s the subset graph, which I am just using to test

<graph id="Graph">
  <version>1.0</version>
  <node id="Read">
    <operator>Read</operator>
    <sources/>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <file>/Users/rbiessel/Documents/Products/Hawaii/S1B_IW_GRDH_1SDV_20180508T042948_20180508T043023_010825_013CA6_77D0.zip</file>
    </parameters>
  </node>
  <node id="Subset">
    <operator>Subset</operator>
    <sources>
      <sourceProduct refid="Read"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <sourceBands>Amplitude_VH,Amplitude_VV</sourceBands>
      <region>0,0,25136,23700</region>
      <geoRegion>POLYGON ((-154.75111389160156 19.644397735595703, -155.2371368408203 19.644397735595703, -155.2371368408203 19.258237838745117, -154.75111389160156 19.258237838745117, -154.75111389160156 19.644397735595703, -154.75111389160156 19.644397735595703))</geoRegion>
      <subSamplingX>1</subSamplingX>
      <subSamplingY>1</subSamplingY>
      <fullSwath>false</fullSwath>
      <tiePointGridNames/>
      <copyMetadata>true</copyMetadata>
    </parameters>
  </node>
  <node id="Write">
    <operator>Write</operator>
    <sources>
      <sourceProduct refid="Subset"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <file>/Users/rbiessel/GRAPH_Subset_S1B_IW_GRDH_1SDV_20180508T042948_20180508T043023_010825_013CA6_77D0.dim</file>
      <formatName>BEAM-DIMAP</formatName>
    </parameters>
  </node>
  <applicationData id="Presentation">
    <Description/>
    <node id="Read">
            <displayPosition x="37.0" y="134.0"/>
    </node>
    <node id="Subset">
      <displayPosition x="208.0" y="147.0"/>
    </node>
    <node id="Write">
            <displayPosition x="455.0" y="135.0"/>
    </node>
  </applicationData>
</graph>
#4

I think it was a problem with the executable path. I setup a linux machine and encountered the same problem. I then added the correct path and it seems to actually run the graph, (runs out of memory though).

#5

For me, this looks like you are calling gpt two times.

This might work better:
/Applications/snap/bin/gpt /Users/rbiessel/hawaiiSubset.xml

1 Like
#6

That’s probably why the path fixed it. Thanks! It’s helpful to have an extra set of eyes, kind of figured it was something stupid like that.

1 Like