LogFile - logging errors

[stupomer]

Hi All,
I would like to keep a log of errors running in my various macros. I saw in the helpfile the following code

Register function LogErrors to run when current thread (running macro) ends:
atend LogErrors
...

Function LogErrors:
if(_error.source) ;;macro ended due to an error
str macroname.getmacro(getopt(itemid 3) 1)
str functionname.getmacro(_error.iid 1)
str s.format("Macro %s ended due to an error in %s.[]Error description: %s[]Error line: %s" macroname functionname _error.description _error.line)
LogFile s 1

I am not sure how to implement this. I created the Logerrors function. But when I put the statement

Code:

Copy      Help

atend LogErrors

at the end of a macro that would throw an error, nothing showed up in the logfile (though it did show up in the QM Output window.

Do I need to put the "atend LogErrors" statement at the beginning of the macro (before the error-producing statement? Do I have to define _error somewhere.
I am ambarrassed that these must be basic programming questions. Hopefully will be easy to answer.

Thanks, Stuart