To verify that the disk is not full:
1. Navigate to the root folder of the disk that contains the results of the project. For example if the images are in C:/Users/username/myProjects/project_1, navigate to the folder C:/.
2. Right click on the folder and click Properties.
3. Verify that free space is left on the disk. If no space is left, either free some space by deleting files, or move the project to another disk.