This warning occasionally occurs and aborts Therion compilation, despite it only being a warning. In addition the therion log file also only contains the warning. All other information is removed and no other output is produced. "C:\Program Files (x86)\Therion\therion.exe: warning -- error deleting temporary directory -- C:\Users\Bruce\AppData\Local\Temp\th7272" Sometime back, 5.3.16-ish I think, this type of warning was just that, a warning that did not impact on the project being compiled. After a while Therion, or the user, would successfully delete the temporary folder and all would be well. This time around this project would not get past the error, even though I manually deleted all the temporary folders. Other projects compiled OK. As is often the case, it was my own fault, I was busy drawing, and had created a new scrap, but had forgotten to add any 'point stations'. As I had not scaled the scrap either, Therion quite rightly did not know where to put it or what size to make it. The result being Therion aborts with the above warning and deletes all log information that the user could have used to debug the situation. I seem to recall that this scenario used to cause a different error message, but one that was a little more helpful to the user. Maybe this could be trapped and a useful message provided in a future release? Thanks Bruec