Correct bond length is missing from the mmff94 prm file. The test molecule is O1C(C(C(C(C1O)NC(=O)N(N=O)C)O)O)CO that can be found in the drugs.smi file in the test suite.
Cannot find Namide-N=O bond length in mmff94 param file.
Cannot find Namide-N=O bond length in mmff94 param file.