Description
Due to a problem in the DSP Builder for FPGAs, you may see this error when attempting to customize the “MegaCore Import” block from the "DSP Builder for FPGAs - Standard Blockset" library in Simulink.
Resolution
To work around this problem, rename the MegaCore Import block with a name that does not contain spaces. For example, the name “MegaCore_Import” will work correctly.