error on pcl_viewer

edit

Hi everyone,

I use rgbdslam v2 to build 3D map and I save the map to file .pcd format. When I use command pcl_viewer to read the file .pcd format, it says,

The viewer window provides interactive commands; for help, press 'h' or 'H' from within the window.

Loading quicksave.pcd [pcl::PCDReader::readHeader] No points to read.

I hope someone can help me solve it. Any suggestion is welcome. Thanks in advance. cheers.

jwlifly