DRT: com.google.common.base.VerifyException: null

[FNaqavi]

Dear all,

I got this error at iterations 20 of one run and 22 of another run of my DRT scenario. Any idea how to fix it?

This is my drt and dvrp settings for now:

<module name="multiModeDrt">
    <parameterset type="drt">
        <parameterset type="ExtensiveInsertionSearch"/>
        <param name="changeStartLinkToLastLinkInSchedule" value="true"/>
        <param name="drtServiceAreaShapeFile" value="./center1.shp" />
        <param name="maxTravelTimeAlpha" value="2.0"/>  
        <param name="maxTravelTimeBeta" value="900.0"/>
        <param name="maxWaitTime" value="600.0"/>
        <param name="operationalScheme" value="serviceAreaBased"/>
        <param name="stopDuration" value="10.0"/>
        <param name="vehiclesFile" value="drt_osm_2000.xml"/>
        <param name="writeDetailedCustomerStats" value="true"/>
        <parameterset type="zonalSystem">
            <param name="zonesGeneration" value="GridFromNetwork"/>
            <param name="cellSize" value="500"/>  
        </parameterset>
        <parameterset type="rebalancing">
            <parameterset type="minCostFlowRebalancingStrategy">
                <param name="targetAlpha" value="0.5"/>
                <param name="targetBeta" value="0.5"/>
            </parameterset>
        </parameterset>
        <parameterset type="drtfare">
            <param name="basefare" value="0"/>
            <param name="dailySubscriptionFee" value="34"/>
            <param name="distanceFare_m" value="0"/>
            <param name="timeFare_h" value="0"/>
            <param name="minFarePerTrip" value="0.0"/>  
        </parameterset>
    </parameterset>
</module>

<module name="dvrp">
    <parameterset type="travelTimeMatrix">
        <param name="cellSize" value="500"/>   
        <param name="maxNeighborDistance" value="1000"/>   
    </parameterset>
    <param name="networkModes" value="car"/>
    <param name="travelTimeEstimationAlpha" value="0.05"/>
</module>

[FNaqavi]

Update:

I set "maxTravelTimeAlpha" to 1, and it ran without error. It seems that there is a bug that causes this error.
Here is my log file.

slurm-5715213.txt

Also, when I create the DRTs on random links within the shapeFile, I get the same error (even with "maxTravelTimeAlpha" =1). Last time I got it after 20+ iterations, the simulation runs if I hand-pick certain fairly longer links and create DRTs on those links.

Here is the log file for this one:
slurm-6016952.txt

The network is generated by MATSim tools from OSM, and is cleaned.

I hope this bug gets fixed.

[FNaqavi]

Update:

Even when creating DRTs on certain links this error might be thrown! This one happened after several (around 5) iterations.

slurm-6185319.txt

Is there a way to fix this?

[nkuehnel]

Which version of matsim/drt are you using? Are you using prebooking?

There have been a few updates to the scheduler this year

[FNaqavi]

Dear Nico (@nkuehnel ),

Here is my pom file: pom.txt

I tried to change the MATSim version to a more recent version, but other dependency errors arose and I couldn't run it. I use java/17.0.4.

Best,
Fatemeh

[nkuehnel]

Mh I'm afraid it's hard to tell from the verify exception, since it's not so descriptive.
What other dependency errors do you get, maybe you can sort them out?

[FNaqavi]

class file has wrong version 65.0, should be 61.0.
Are the new updates incompatible with Java 17? That is the version I am currently using (on the remote server, with no privileges).

This is part of the error:

[ERROR] /Stockholm_MATSim_Drt/src/main/java/org/matsim/RunMatsim.java:[21,41] cannot access org.matsim.contrib.drt.run.DrtControlerCreator
  bad class file: ~/.m2/repository/org/matsim/contrib/drt/2025.0-2024w38/drt-2025.0-2024w38.jar(/org/matsim/contrib/drt/run/DrtControlerCreator.class)
    class file has wrong version 65.0, should be 61.0
    Please remove or make sure it appears in the correct subdirectory of the classpath.
[ERROR] /Stockholm_MATSim_Drt/src/main/java/org/matsim/RunMatsim.java:[25,31] cannot access org.matsim.api.core.v01.Scenario
  bad class file:~/.m2/repository/org/matsim/contrib/drt/2025.0-2024w38/drt-2025.0-2024w38.jarr(/org/matsim/api/core/v01/Scenario.class)
    class file has wrong version 65.0, should be 61.0
    Please remove or make sure it appears in the correct subdirectory of the classpath.

[nkuehnel]

Indeed, the latest matsim versions are compiled with java 21:
https://github.com/matsim-org/matsim-libs/blob/5f58a97e2538b5c7a184ab07d52d2fcdcd8909d8/pom.xml#L370-L377

[FNaqavi]

Thank you so much!