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Hi everyone! I'm trying to automate the calculation of some product systems in the Jupyter Notebook while for some product systems in my Mac, there's an error in Jupyter:

ERROR:root:calculation failed: -32000: Unhandled server error: null

The log in OpenLCA is as follows:

3210283NanoHttpd Request Processor (#121)ERRORorg.openlca.ipc.handlers.CalculatorCalculation failed
java.lang.NullPointerException 
     at org.openlca.core.math.DataStructures.matrixData(DataStructures.java:124) 
     at org.openlca.core.math.SystemCalculator.calculator(SystemCalculator.java:109) 
     at org.openlca.core.math.SystemCalculator.calculateSimple(SystemCalculator.java:51) 
     at org.openlca.ipc.handlers.Calculator.calculate(Calculator.java:194) 
     at org.openlca.ipc.handlers.Calculator.calculate(Calculator.java:114) 
     at sun.reflect.GeneratedMethodAccessor30.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at java.lang.reflect.Method.invoke(Method.java:498) 
     at org.openlca.ipc.Server$Handler.invoke(Server.java:151) 
     at org.openlca.ipc.Server.getResponse(Server.java:125) 
     at org.openlca.ipc.Server.serve(Server.java:111) 
     at fi.iki.elonen.NanoHTTPD$HTTPSession.execute(NanoHTTPD.java:945) 
     at fi.iki.elonen.NanoHTTPD$ClientHandler.run(NanoHTTPD.java:192) 
     at java.lang.Thread.run(Thread.java:748)

Does anyone know what the problem is and how to solve it? Thanks in advance for any help:)

in openLCA by (230 points)

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