Text file containing error messages generated by a program; may be written as a program loads, executes, or closes; often used by software developers when testing or profiling programs.
Since programs often print to standard "out" and standard "err" streams when run, a developer may choose to redirect this output to a log.out file for normal output and log.err for error output. Both files may be appended rather than overwritten between runs of the program so that the history is maintained over successive runs.
Application log file generated by AutoCAD, a CAD application used by engineers for creating 3D designs; contains information related to a program crash; may include the error text, date and time the error occurred, and the name of the drawing that was opened when the program unexpectedly quit; used for diagnosing and troubleshooting application problems.
AutoCAD application errors, such as Fatal Errors and Internal Errors, are stored in the file acad.err.