No matter what I try, Quartus just spams errors similar to this:

Error (12009): Node "modulus[31]" is missing source

what I'm trying to achieve

  • \$\begingroup\$ And what is TEST_WIDTH? 31? \$\endgroup\$
    – user16324
    Commented Jan 29, 2017 at 19:27

1 Answer 1


Create a LPM_CONSTANT block from the Symbol tool, shown below.

Adding the LPM_CONSTANT block to the block diagram file (BDF).

Then double click the symbol to go to symbol properties and enter the desired value and bus width, shown below.

How to enter the constant value into the LPM_CONSTANT block.


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