CID parser syntax error when negative sequence number is present

[scotthoh]

Hi Marcin,
I am replacing mmdb with gemmi for reading structure files in clipper library and came across the CID parser syntax error when dealing with structure files that has negative sequence number.
One example is 6zhy.cif where the selection parser came back with syntax error with the CID line "/1/I/-72(DA)".
Is there a way to deal with such encounter? Thanks.