IBO's and glDrawElements

[Aumnayan]

So what I am attempting to do is create multiple pieces of geometry and concate them together into an IBO I can then iterate over displaying each piece of geometry via glDrawElements. I know that I have created & uploaded the VBO correctly, and have the desired index list made. I can see this by replacing the glDrawElements by a glDrawArrays and I get the appropriate geometry on the screen. Which indicates to me that the problem is either how I am uploading the IBO to gl or in the glDrawElements command. I've been over this multiple times and can't seam to pinpoint the problem, is there something obvious going on that I am simply not seeing? Code snippet below:

void SVIS_displayVectorData(SVIS_VECTORDATA *data)
{
  int i;
 
  // First we validate the data, then ensure that it's uploaded, then, finaly,
  // display it.
  if (data && data->vectorLoadComplete) {
    if (!data->vboCreateComplete) {
      glGenBuffers(1, &data->vbo);
      glGenBuffers(1, &data->ibo);
      glBindBuffer(GL_ARRAY_BUFFER, data->vbo);
      glBufferData(GL_ARRAY_BUFFER, sizeof(SVN_VEC3) * data->maxVerticies, 
                   data->verts, GL_DYNAMIC_DRAW);
      data->vboCreateComplete = TRUE;
    } else {
      if (data->zoomLvl != G_mapZoom) {
        //NOTE: data->indicies are propogated at this point, TODO: Repopulate based on zoom level.
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, data->ibo);
        glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int) * data->maxVerticies, // 1:1 ratio of verts to indicies is max case.
                     data->indicies, GL_DYNAMIC_DRAW);
        data->zoomLvl = G_mapZoom;
      }
 
      // At this point, we do the actual drawing.
      glEnableClientState(GL_VERTEX_ARRAY);     // Enable vertex points
      glEnable(GL_POLYGON_SMOOTH);              // Don't know if this is neccisary
      glDepthFunc(GL_ALWAYS);                   // Don't let terrain be drawn on top
 
      // NOTE: Don't set color or line width here. These should be done by
      // the calling procedure.
      glBindBuffer(GL_ARRAY_BUFFER, data->vbo);
      glVertexPointer(3, GL_FLOAT, sizeof(SVN_VEC3), 0);
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, data->ibo);
      for (i = 0; i < data->numElements; i++) {
        SVIS_VECTOR_ELEMENT *ptr = &data->elements[i];
        glDrawElements(GL_LINE_STRIP, ptr->indicyCount, GL_UNSIGNED_INT, 
                       ptr->startIndicyIndex * sizeof(unsigned int));
        //glDrawArrays(GL_LINE_STRIP, ptr->startIndicyIndex, ptr->indicyCount); // NOTE: replacing glDrawElements with this works.
      }
 
      glDepthFunc(GL_LESS);                     // Reset to default
      glDisable(GL_POLYGON_SMOOTH);             // See comment for Enable
      glDisableClientState(GL_VERTEX_ARRAY);    // Clean up the gl state.
    }
  }
}

[Aumnayan]

Nevermind, I found the problem. The initial state of the system had data->zoomLvl == G_mapZoom causing the IBO not to be allocated/filled.