MFnMesh error creating UVSet

[Anonymous]

So I have used MFnMesh class to create a mesh, -- but I am having difficulties setting UVs.

First -- when creating a mesh -- I have realized that the current UV set name is empty.

MObject meshMObj = fnMeshCreator.create(uniquePositionsList->Count, mesh->Triangles->Count, mPointArray, polygonCounts, polygonConnects, meshTransformObj);

MFnMesh fnMesh(meshMObj);

MString setName
fnMesh.getCurrentUVSetName(setName);

//This always is empty
cerr << setName << endl;

I have tried doing the following: 

MObject meshMObj = fnMeshCreator.create(uniquePositionsList->Count, mesh->Triangles->Count, mPointArray, polygonCounts, polygonConnects, meshTransformObj);

MFnMesh fnMesh(meshMObj);

MString setName = "UVSet";

fnMesh.createUVSet(setName);
fnMesh.setCurrentUVSetName(setName);

fnMesh.getCurrentUVSetName(setName);

//The following still returns an empty string
cerr << "Current setName: " << setName << endl;

Looking at the Maya Documents  "If there is no current uv set, then a empty string will be returned on the string argument passed on."

So I am thoroughly confused

[Anonymous]

Hi,

Please check if create() maybe already failed, because your input values contain errors?

My tip is to always check the status for each function, then you maybe see it failed already earlier than you expected.

[Anonymous]

I just checked it -- create function did not have any errors.

MObject meshMObj = fnMeshCreator.create(uniquePositionsList->Count, mesh->Triangles->Count, mPointArray, polygonCounts, polygonConnects, meshTransformObj, &status);

if (status == MStatus::kFailure)
{
   cerr << "Never reached" << endl;
}

MFnMesh fnMesh(meshMObj);
MString setName = "UVSet";
fnMesh.createUVSet(setName);
fnMesh.setCurrentUVSetName(setName);
fnMesh.getCurrentUVSetName(setName);
cerr << "Current setName: " << setName << endl;