wrt0022 .EXE may not execute properly -- undefined symbols

     Explanation:  .RTLink warns you if there are any undefined symbols
     remaining at the end of a run which is generating an executable file
     (.EXE).  This warning message sets the DOS return code to 1.

     Action:  Undefined symbols at the end of a .PLL generation run are
     generally not a problem, but if they are not resolved when an executable
     file (.EXE) is generated, the .EXE file is usually not correct.