AutoCAD LT can maintain a log of its actions while attaching, detaching, and reloading xrefs and while loading a drawing containing xrefs. This log is maintained only if the XREFCTL system variable is set to 1. The default setting is 0.
The log file is an ordinary ASCII text file with the same name as the current drawing and a file extension is .xlg. If you load a drawing with the file name sample.dwg, for example, AutoCAD LT searches for a log file named sample.xlg in the current directory. If the file does not exist, AutoCAD LT creates a new file with that name.
Once a log file has been created for a drawing, AutoCAD LT continues to append information to it. AutoCAD LT writes a title block to the log file each time the file is opened. If the log file becomes too large, you can delete it.
Example: A sample title block from an xref log file
During a detaching or reloading operation, AutoCAD LT prints the nesting level of all affected xrefs immediately following the title block. To see a reference tree for a set of xrefs in your current drawing, use Detach or Reload and check the resulting entries in the log file.
Example: A sample log file entry showing nested xrefs
AutoCAD LT writes an entry in the log file for each dependent symbol temporarily added to the current drawing and for any errors that occur. Most error messages are written both to the screen and to the log file.
Example: A sample log file showing the results of attaching an xref