Description
This error occurs during compilation of VHDL designs after you delete all of the .dls files from your hard drive(s).
The error occurs because the .dls files from the maxplus2\vhdl93\std or maxplus2\vhdl87\std library directories were deleted.
These .dls files are required to use the library packages within the
vhdl87 and vhdl93 directories. If these files are deleted, the MAX PLUS II software should be re-installed to replace them.
MAX PLUS II Help states that when troubleshooting "unknown error" messages you should delete the .dls files in the current project directory and recompile.Be sure to delete .dls files within your project directory only, not within the maxplus2\vhdl87 or maxplus2\vhdl93 directories.