Reciving signal: "EXC_BAD_ACCESS" when attempting to transform TextFrameArt objects.

GDB is reciving signal: "EXC_BAD_ACESS" when I try to transform a TextFrameArt using the TransformArtSuite. Here is an exampke code.

(Note I'still with CS5 SDK.)

AIErr

SetPointTextMatrix( AIArtHandle textArt, AIRealMatrix *matrix)

{

    AIErr error = kNoErr;

    int textType;

    VMGetTextType( textArt, &textType);

    if (textType == kPointTextType)

    {

        /* since we cannot set the matrix directly, we need to calculate a

         tranformation and transform the object:

         Let C be the <currentMatrix>

         Let R be the final <matrix>

         Let T be the <transformation> matrix

         Since,

            R = C * T

         then we can calulate

            T = inv(C) * R

         */

        AIRealMatrix currentMatrix, transformation;

        GetPointTextMatrix( textArt, &currentMatrix);

        sMath->AIRealMatrixInvert( &currentMatrix);

        sMath->AIRealMatrixConcat( &currentMatrix, matrix, &transformation);

        /* THIS IS WHERE IT ALL GOES WRONG: - the content of the <transformation> matrix is OK */

        error = sTransformArt->TransformArt( textArt, &transformation, 1.0, kTransformObjects));

    }

    return error;

}

Anyone know why?