Failed extracting file

I have a strange error during installation:
While trying to extract file using the following command:

SetOutPath $INSTDIR\bin
File bin\*.pack
File bin\*.exe
File bin\*.bat
File bin\*.dll

i have 2 dll files that should be extracted
but one of the files is not extracted
in the log i have the following line:

Extract: msvcr71.dll... 100%

So actually there is no indication that the file was not extracted.

Is there any way to see at runtime that there is a failure?
Why did can this happen?

It seems that the file wasn't packed on compile time. Check compile log if it was packed or not.

Thanks
After inspecting the issue again it seems that i had another problem regrading the order of actions performed during installation