This issue occurs if the symbol library path is incorrect.
To reset the path go to HyDraw > Options on the Home tab.
The HyDraw Options dialog box displays.
Under Application Settings tab Library Path set the library paths as follows.
(All paths shown are default)
C:\VEST\HyDraw Library <version>\Data
C:\VEST\HyDraw Library <version>\Symbol Library
C:\VEST\HyDraw Library <version>\SubSystems
Exit and Reopen HyDraw CAD.