I have develop a mac program, it works fine when I use it. But, sometimes when I close the program, I get some error messages in console output like below:
CoreAnimation: rendering error 506 --ImageKit Error: error before reading pixels: 506 --ImageKit Error: error after reading pixels: 506
This does not occur everytime, seems like it just happen randomly. What operation may cause this problem? How can I figure out it? I have no idea at all. Please give me some advise about it. Thanks a lot.