External entity's PUBLIC identifier not given in LIBRARY declaration.
          #6032   Run-time catchable error
          External entity's PUBLIC identifier not given in LIBRARY declaration.
Additional Information
 For element 'X' : For attribute 'Y' = entity "Z", public
id is 'A'.
     where Z is the name of the external entity.
     or
 For external entity 'X': public id is 'Y'.
Explanation
An external entity has a specified public identifier which was not
defined by a library declaration in the OmniMark program.