[mtasc] without output message

[Horacio Soca]

hello, 
 
I am proving the MTASC use

I write the following thing in my CMD Window:

"mtasc -swf tuto.swf -header 800:600:20 -main Tuto.as"

this works without problems, if Tuto.as has errors, MTASC shows to me as
they are

now change the form of execution by this: 
"mtasc -swf tuto_2.swf -header 800:600:20 -main Tuto.as >report.txt"
this is the source of a BAT file, I execute it and there is no output
message, the report.txt file is "blank file" !

after this him change the source to the BAT by this:
"mtasc -swf tuto_2.swf -header 800:600:20 -main Tuto.as -v >report.txt"

now "report.txt" has an output, but it does not have the messages of error
in the code of "Tuto.as" (let us suppose that "Tuto.as" has errors)

then:  because I do not obtain the correct output message?

thanks in advance,
Horacio