Dear all, I am using ENVI +IDL 4.8 and the ROI tool to calculate statistics from a raster (*tif, 500m pixel spacing) Having overlaid the ROI to the image I use "stats" from ROI tool; however I get the following error: envi stats doit: An error has occurred during processing Error: "Out of range subscript encountered: ADDR. "The result may be invalid" Any ideas? Regards Dimitris