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Hello, I am using CcpNmr Analysis 2.4.2 on Windows. While I could successfully add several small molecules to CCPN, somehow D-Phe doesn't work. I have added both ChemComp and ChemCompCoord files from Github to CCPN and can see the molecule in the small compounds tab under the Molecule:Molecules pop-up window. But D-Phe can't be added to my peptide sequence on the "Add sequence" tab. The error message is shown as below. Exception in Tkinter callback Traceback (most recent call last): File "Tkinter.pyo", line 1410, in __call__ File "C:\Program Files (x86)\CCPN\ccpn\python\ccpnmr\analysis\popups\EditMolecules.py", line 3219, in commitPolymerSeq File "C:\Program Files (x86)\CCPN\ccpn\python\ccp\lib\MoleculeModify.py", line 123, in addMolResidues File "C:\Program Files (x86)\CCPN\ccpn\python\ccp\lib\MoleculeModify.py", line 212, in makeLinearSequence File "C:\Program Files (x86)\CCPN\ccpn\python\ccp\lib\MoleculeModify.py", line 354, in _getLinearChemCompData ApiError: No ChemCompVar found for protein:D-Phe linking middle I have tried a few different D-Tyr files, but they all don't work. Is there any way I can solve this issue? Thank you, Soo ######################################################################## To unsubscribe from the CCPNMR list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCPNMR&A=1