In the Quartus II software version 11.0, an SOPC Builder system created in the Quartus II software version 10.1 that uses an altera_avalon_clock_source BFM cannot be opened

Description

If you attempt to update an SOPC Builder system that uses altera_avalon_clock_source bus functional model (BFM) from the Quartus II software version 10.1 to the Quartus II software version 11.0, the system cannot be opened.

Resolution

In SOPC Builder version 11.0, add the 10.1 version of the component to the search path and explicitly use only the 10.1 version with SOPC Builder.