Error: Port "i1" does not exist in primitive "nand2" of instance "g2"

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I have some problem using quartus ii 11

my code is:

I get the following errors:

Error: Port "i1" does not exist in primitive "nand2" of instance "g2"

Error: Port "i2" does not exist in primitive "nand2" of instance "g2"

Error: Port "o1" does not exist in primitive "nand2" of instance "g2"

Error: Can't elaborate top-level user hierarchy

Error: Quartus II Analysis & Synthesis was unsuccessful. 4 errors, 8 warnings

can anybody help me?

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Hi,

I did not see any code of you. I assume you have a name mismatch between the NAND itself and the instanciation of the NAND.

Kind regards

GPK