Hardware Accelerators Remain After Deleting the Software Project

If a system contains C2H accelerators, deleting the software project that defines the accelerators does not remove the accelerators from the hardware system, and the accelerator logic remains in the SOPC Builder system.

To remove an accelerator from a system, delete the accelerator from the C2H view in the Nios II IDE first, and then recompile the software project. The C2H Compiler then removes the accelerator from the SOPC Builder system. Once the compilation is complete then the software application can be deleted from the workspace.