Dear Exelis, I observe that ENVI improves itsels with every new update. However Seamless mosaic tool is degrading what ENVI provided with version 5.0. Seamless mosaic does lack the following: * No project File: the widget crashes for 100 x 30x30 km 7.5meters RGB RASAT images. * No batch parameter change, I want change parameters for all files. Georeferenced Mosaic worked 2000+ RASAT images, even it took several days, it worked. My Colleague has been working few weeks just to make 1/5th of what ENVI 5.0 did in a day. For 2000+ mosaic files, I opened mosaic files with a text editor. I added one mosaic with defaults values, and added another with the values I wanted. Then I replaced default values within the text editor. Georeferenced Mosaic Tool is much better if you added bulk parameter change and zoomable interface. It is really much more stable. Best Regards Mustafa Teke Note: There is a support request regarding this issue, I may update if the problem is being solved.