Hi Ryan,
Thank you for the hint. In deed, it resolved my problem.
I do have plenty of disk space on system drive. However, I have configured a 1 GB RAM disk for the scratch folder of Sighthound Video to reduce the DISK IO overhead and improve system overall performance. This was working perfectly until version v4.0.4, where I faced the issue. So, based on your hint, I increased the allocated RAM and it worked; although I don't see any increase in the disk space utilization of the scratch folder. It looks like that you changed something to do with disk space housekeeping algorithm in v4.0.4 onward.
On the other hand, I recommend to consider having an option to use the system RAM instead of disks for the scratch folder because it helps to improve system performance by reducing disk IO operations and save the disk life especially in case of SSD.
Unfortunately, I haven't received your responses and I not sure what is wrong.Nevertheless, the issue is now resolved. Thank you
