Error when running the CstfileToTheozymePDB Application

Hello,

I am relatively new to Rosetta, and i am trying to generate a constraint file (.cst) with my catalytic amino acid and ligand defined, that i am going to use to search against a PDB database. However, no matter how hard i try i keep obtaining this error:

protocols.toolbox.match_enzdes_util.InvrotTree: A total of 112 unique definitions of the invrot tree exist.
protocols.toolbox.match_enzdes_util.InvrotTree: Writing definition 1 to file PDB_Model_RD-2.cst_1.pdb...
protocols.toolbox.match_enzdes_util.InvrotTree: 100 invrots for list 0, 54 invrots for list 1, 15 invrots for list 2, 10 invrots for list 3, 234 invrots for list 4, 10 invrots for list 5,

ERROR: Assertion `serial_to_serial_with_ter.count(ai.connected_indices[ c_index ] )` failed.
ERROR:: Exit from: src/core/io/pdb/pdb_writer.cc line: 616

[ ERROR ]: Caught exception:

File: src/core/io/pdb/pdb_writer.cc:616
[ ERROR ] UtilityExitException
ERROR: Assertion `serial_to_serial_with_ter.count(ai.connected_indices[ c_index ] )` failed.

I appreciate all help i can get at this point! Thank you