zEmbedder error [solved]

frantejo

hello I have this error, can you help me please?

// Error: ziva 2017-11-21 22:52:32.318 ERR| zEmbedder zEmbedder1 - solver output dynamic creature is null

andy_vs

frantejo

Hey this is just a general warning saying something went wrong with the state of your sim.

Can you send a scene file to support@zivadynamics.com ?

Thanks!

frantejo

its a warning but the muscles not work, I ll send the scene

andy_vs

frantejo

Hey thanks for sending that through. I'll document how I debugged it for posterity.

So firstly, I opened your scene and saw that it was saved on frame 33, while the solver start frame is set to -10. That won't necessarily break the scene in itself, but for authoring characters we advise that all authoring happens on the solver start frame.

When I reset the timeline, I still saw the same error. To get more detailed output from the script editor, you can change the Ziva verbosity level. If you run this in a mel editor:

 ziva -vb 4

You will get more information.

So now if I try to step forward one frame, I can see this:

// Error: ziva 2017-11-22 14:38:55.206  ERR| zGeoNode zGeo201 - mesh failed basic quality checks:  -nonmanifoldVertices // 
// Error: ziva 2017-11-22 14:38:55.207  ERR| Failed to prepare GeoData cache in zGeo201 // 
// Error: ziva 2017-11-22 14:38:55.208  ERR| Could not compute GeoNode `zGeo201'. // 
// Error: ziva 2017-11-22 14:38:55.318  ERR| zGeo251.iNeutralMatrix has null value. It's probably not connected, but it must be. // 
// Error: ziva 2017-11-22 14:38:55.319  ERR| Could not compute GeoNode `zGeo251'. // 
// Error: ziva 2017-11-22 14:38:55.361  ERR| GeoData: zBone node is null // 
// Error: ziva 2017-11-22 14:38:55.420  ERR| GeoData: zTissue node is null // 
// Error: ziva 2017-11-22 14:38:55.504  ERR| zFiber:zFiber33 cannot compute because iGeo // 
// Error: ziva 2017-11-22 14:38:55.506  ERR| zFiber:zFiber33 cannot compute because iGeo //

So starting at the top, if I find zGeo201 and graph it's connections in the node editor..

image image.png

I can see that it's connected to the spine_skellShape. The first error tells me that there is a problem with non-manifold vertices. if I select that mesh and run

 zMeshCheck;

it tells me which vertices are troublesome.

// Error: |skeleton_grp|spine_skell failed checks: -nonmanifoldVertices // 
// Result: |skeleton_grp|spine_skell.vtx[217] |skeleton_grp|spine_skell.vtx[410] //

image image.png

Using the Ziva menu I just deleted that mesh to see if I could get the scene to a solveable state. I still have this error:

// Error: ziva 2017-11-22 14:49:17.914  ERR| zGeo251.iNeutralMatrix has null value. It's probably not connected, but it must be. // 
// Error: ziva 2017-11-22 14:49:17.916  ERR| Could not compute GeoNode `zGeo251'. // 
// Error: ziva 2017-11-22 14:49:17.958  ERR| GeoData: zTissue node is null // 
// Error: ziva 2017-11-22 14:49:18.012  ERR| zFiber:zFiber33 cannot compute because iGeo // 
// Error: ziva 2017-11-22 14:49:18.014  ERR| zFiber:zFiber33 cannot compute because iGeo // 
// Error: ziva 2017-11-22 14:49:18.016  ERR| Attachment input to zSolver is not a geo data //

If I graph the zGeo251 connections, I can see it doesn't have a corresponding mesh.

image image.png

Seeing as it's an "orphan" zGeo node, I'm going to delete it, and the corresponding zAttachments and zTissue because those won't make sense without geometry. I'm NOT deleting the embedder because that's used by everything.

That's it. The scene now solves.

andy_vs

The orphan zGeo possibly came from deleting a mesh without first removing the ziva nodes. You can do this safely using the delete mesh command in the Ziva menu.

As for the spine, I would save the setup using zBuilder, fix the non-manifold errors, delete the mesh using the Ziva menu, and rebuild using zBuilder. Hope this helps!

frantejo

nice, now works, I appreciate your help

Weskart

Hi, what if you already saved a scene with a mesh deleted without the tool? I don't know how to find corresponding nodes

jamesj

When loading the problem scene, the feedback in the scriptEditor will inform you about which zGeo nodes are not connected properly.
If you select the zGeo node by name and then show it's connections in the hypergraph or nodeEditor, you will then just need to select and delete the nodes that were associated with that particular Tissue, Cloth or Bone.

The following image shows an example of what nodes need to be deleted.
image nodes-to-delete.png

I hope this helps!
-jj

samuel

I'm having this issue too where I got this error // Error: ziva 2022-02-10 10:55:18.467 ERR| zEmbedder zEmbedder - solver output creature is null. I have been looking at different forum about this problem, but I still can't find a way to fix it. I tried to follow this forum's way on fixing it, but my error box doesn't have a zGeoNode that is causing problem, the only error i see is the solver output creature is null. Can anyone help ? Can I send my scene file for you guys to check ?

chengdong

samuel Hello samuel,
The error you posted could be benign if it meets 2 conditions:

This is the only error message
It appears on the Maya scene file with current frame is not the "start frame" set in the zSolverTransform node.
If this is your case, the solution is to go back to the start frame and run simulation again, the error message should not appear.
If you still meet this without other error messages, please send us the scene file. Thank you.

Chengdong

Luziasoares

Hi Chengdong,

I have the exact same problem as samuel. It happened out of nowhere. I went to backup files and it gave me the same error when before it didn't. I have no clue what is happening. Could you possibly look at my scene file?

Thank you!

chengdong

Hello Luziasoares,

I replied you in this thread,
https://community.zivadynamics.com/d/1133-error-zembedder-zembedder1-solver-output-dynamic-creature-is-null

Regards,
Chengdong