Description
You may see this error in the Synplify software version 7.1 if you use an unsupported feature for a particular device.
For example, this error will appear if you target a Stratix™ device and use a CASCADE primitive in your design. The CASCADE primitive can be used in other Altera® device families (e.g., APEX™ devices), but is not supported in Stratix devices.
To eliminate the error message, modify your design so that it does not use the unsupported feature.