Log files and functionality is a terrible mess. It works unless you do not touch the log file (once it is created). If any changes are made to Log, schema, log_grid etc the whole thing becomes total mess! That is what I did and now I cannot get it back to work. I get this error message
[ATTACH=CONFIG]n71778[/ATTACH]
I Think, When a form, Control, Grid are Created, It build in The current table Log. And If the table Log was changed, Then the forms, controls, etc are not updated. Then you must regenarate all forms again.
Yes as in the other post about this issue. I just wasted few hours trying to figure out why this is not working. another words developer should NEVER CHANGE THE LOG FILE NAME in generated security App or he will get errors. At least they should mention this in DOCs. This is done the same was as SQL query builder. One way street only 
On top of that this got completely screwed up because the Error message doe not even say what the problem is (as you see the path at the end is empty).