validator - Flaw in the rule definition: CrosslinkingPeptideModification_may_rule?

[colin-combe]

Hi,

when I switch on "show flaw errors" in the validator, it displays an error saying:

Message 5:
    Rule ID: CrosslinkingPeptideModification_may_rule
    Level: ERROR
    Context(Flaw in the rule definition: CrosslinkingPeptideModification_may_rule )
    --> Could not find property 'Peptide' of the xpath expression '/Peptide/modification/cvParam/@accession' (element position: 1) in the given object of: uk.ac.ebi.jmzidml.model.mzidml.SequenceCollection - Did you mean 'peptide' ?

what does it mean? Is something broken in the rule for CrosslinkingPeptideModification?
Best wishes,
Colin