# \[SOLVED\] Error Visualizing 2D Graph

**URL:** <https://fspm.discourse.group/t/solved-error-visualizing-2d-graph/293>\
**Category:** GroIMP\
**Created:** [June 21, 2024, 10:47am UTC](https://fspm.discourse.group/t/solved-error-visualizing-2d-graph/293 "2024-06-21T10:47:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![michele.butturini](https://avatars.discourse-cdn.com/v4/letter/m/57b2e6/32.png) [@michele.butturini](https://fspm.discourse.group/u/michele.butturini)\
**Post date:** [June 21, 2024, 10:47am UTC](https://fspm.discourse.group/t/solved-error-visualizing-2d-graph/293/1 "2024-06-21T10:47:03Z")

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When I try to visualize the 2d map of my model I get the following error. The 3d representation, instead, works fine: any idea on what could be the cause?

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/fspm/original/1X/1aff1176c9619e52d1c779980ab61da7e581de7a.png)

```
 Warning

```

Unexpected Exception ClassCastException: class de.grogra.turtle.RL cannot be cast to class de.grogra.imp2d.objects.Transformation (de.grogra.turtle.RL is in unnamed module of loader de.grogra.pf.registry.LibraryClassLoader @dd0c991; de.grogra.imp2d.objects.Transformation is in unnamed module of loader de.grogra.pf.registry.LibraryClassLoader @4a94ee4) Stack Trace: java.lang.ClassCastException: class de.grogra.turtle.RL cannot be cast to class de.grogra.imp2d.objects.Transformation (de.grogra.turtle.RL is in unnamed module of loader de.grogra.pf.registry.LibraryClassLoader @dd0c991; de.grogra.imp2d.objects.Transformation is in unnamed module of loader de.grogra.pf.registry.LibraryClassLoader @4a94ee4) at de.grogra.imp2d.Visitor2D.visitEnter(Visitor2D.java:105) at de.grogra.imp2d.Visitor2D.visitEnter(Visitor2D.java:86) at de.grogra.rgg.model.Instantiation.instantiate(Instantiation.java:222) at de.grogra.rgg.model.Instantiation.instantiate(Instantiation.java:188) at de.grogra.rgg.model.Instantiation.operator$space(Instantiation.java:95) at surroundings$RoomFloor.instantiate(pfs:surroundings.rgg:96) at surroundings$RoomFloor.instantiate(pfs:surroundings.rgg:96) at de.grogra.rgg.model.Instantiation$1.instantiate(Instantiation.java:48) at de.grogra.graph.impl.GraphManager.accept0(GraphManager.java:1663) at de.grogra.graph.impl.GraphManager.accept(GraphManager.java:1769) at de.grogra.imp2d.PickRayVisitor.pick(PickRayVisitor.java:48) at de.grogra.imp2d.View2D.pick(View2D.java:292) at de.grogra.imp.ViewEventHandler.calculateHighlight(ViewEventHandler.java:487) at de.grogra.imp.ViewEventHandler$1.run(ViewEventHandler.java:467) at de.grogra.pf.ui.UI$1Task.run(UI.java:557) at de.grogra.graph.impl.GraphManager.invokeRun(GraphManager.java:335) at de.grogra.util.LockableImpl.invokeRun0(LockableImpl.java:562) at de.grogra.util.LockableImpl.executeImpl(LockableImpl.java:308) at de.grogra.util.LockableImpl.execute(LockableImpl.java:272) at de.grogra.pf.ui.UI.executeLockedly(UI.java:604) at de.grogra.pf.ui.UI.executeLockedly(UI.java:611) at de.grogra.imp.ViewEventHandler.mouseMoved(ViewEventHandler.java:457) at de.grogra.imp.ViewEventHandler.manageView(ViewEventHandler.java:304) at de.grogra.imp.ViewEventHandler.eventOccured(ViewEventHandler.java:243) at de.grogra.pf.ui.awt.EventAdapter.run(EventAdapter.java:114) at de.grogra.imp.IMPJobManager.run(IMPJobManager.java:558) at java.base/java.lang.Thread.run(Unknown Source)

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**Author:** ![gaetanH](https://avatars.discourse-cdn.com/v4/letter/g/edb3f5/32.png) [@gaetanH](https://fspm.discourse.group/u/gaetanH)\
**Post date:** [June 24, 2024, 8:25am UTC](https://fspm.discourse.group/t/solved-error-visualizing-2d-graph/293/2 "2024-06-24T08:25:57Z")

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Hi Michele,

Did you try to open the 2d “view” or “graph”?

The 2d view cannot work with 3d objects and will throw error such as the one you display.

If you want to see the topology of your graph the panel you want is "2d

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<div class="post-metadata">

**Author:** ![michele.butturini](https://avatars.discourse-cdn.com/v4/letter/m/57b2e6/32.png) [@michele.butturini](https://fspm.discourse.group/u/michele.butturini)\
**Post date:** [July 26, 2024, 8:06am UTC](https://fspm.discourse.group/t/solved-error-visualizing-2d-graph/293/3 "2024-07-26T08:06:03Z")

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Indeed, that was the solution - thank you!