If the Macro Assembler detects any errors, it does not create an object file but does create an error listing file. This file is generated in the directory the source file was found (for more information, refer to the topic ERRORFILE: Filename specification error.
If the Assembler's window is open, it displays the full path of all include files read. After successful assembling, the number of code bytes generated is displayed, too. In case of an error, the position and filename where the error occurs is displayed in the assembler window.
If the Assembler is started from the IDE (with ' %f' given on the command line) or CodeWright (with ' %b%e' given on the command line), this error file is not produced. Instead, it writes the error messages in a special Microsoft default format in a file called EDOUT. Use WinEdit's Next Error or CodeWright's Find Next Error command to see both error positions and the error messages.