In the Training phase of the Classification Wizard (Supervised, Support Vector Machine selected) an error message is displayed saying the tool has failed. It gets to just past 50% of "generating segmented dataset" and the tool fails. Detail of the error is a Error 999999 and several tables not found. The input is a Pro created mosaic of NAIP images. The uncompressed file is 20.5 GB. Why is the tool failing? Is it the tool? Is it the input data? Is it a lack of sufficient memory? An photo of the error message is attached.