[JS][CS5.5] - Graphic layers loop error "object no longer exists"

I'm trying to loop through graphic layers of a specific graphic and set the current visibility based on the name of the layer.

Currently the script is erroring on the 2nd time though the loop.

I run the code and only the first graphic layer turns off then I get an error, "the requested action could not be completed because the object no longer exists". If I run it again the 2nd graphic layer turns off and the 3rd time through the loop errors with the same message, etc. etc.

I've included all the code for reference but feel free to concentrate on the graphic layer loop (j index).

Any ideas on what is happening? Thanks!

        var doc = app.activeDocument;
        var textFind = RegExp (/(text)|(type)|(title)|(legend)/i);
        //count layers
        var layerCount = doc.layers.length;
        
        //loop through layers
        for (i=0; i < layerCount; i++) {
        
            //set current layer
            var currentLayer = doc.layers;
            var clName = currentLayer.name;
            
            //count layer graphics
            var clGraphicCount = currentLayer.allGraphics.length;
            
            //check layer name & # of graphics
            if (clName.match (/^(temp).+/) && clGraphicCount == 2) {
                
                //set  raster instance
                var rasterInst = currentLayer.allGraphics[0];
                
                //count raster instance graphic layers
                var rasterInstGraphicLayerCount = rasterInst.graphicLayerOptions.graphicLayers.length;
                
                //check raster instace graphic layers
                if (rasterInstGraphicLayerCount > 1) {
                    
                    //loop through graphic layers
                    for (j=0; j < rasterInstGraphicLayerCount; j++) {
                        
                        //set current graphic layer
                        var riGLlayer = rasterInst.graphicLayerOptions.graphicLayers;
                        var riGLname = riGLlayer.name;
                        var riGLvis = riGLlayer.currentVisibility;
                        
                        //check visibility for non-text
                        if (riGLname.match (textFind)) {
                            
                            //turn off text graphic layers
                            riGLlayer.currentVisibility = false;
                            
                            };
                        
                        };
                    
                    };
                
                };
            
            };