General Description: When creating a schematic symbol or doing some other sort of synthesis on VHDL files, the following error occurs:
ERROR: This design does not contain an entity named xxxxxxxxx . . . Done: failed with exit code 001
The transcript window is small and there is probably more than just this error. Scrolling up in the transcript window will likely reveal another syntax problem with the code. Verify that all syntax is correct in regard to this other error.