There are times when I am running a test on an expression, either LUA or eccoext script, and when I close the evauation box ecco closes without any warning.  It closes completed.  That is, it does not minimize to the start bar, it is completely removed as a functioning entity.  There does not appear to be any residual part of the program running when I check with the Task Manager.

Further testing shows that if the evalator window is cleared of the lua script that all is well, the problem only happes when the window contains a large number of lines of script.
 
It should be noted that when ecco is closed that it does not save recent changes to teh dta file, rather annoying.