Error in Ions Adding Stage

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I have faced in ions adding steps. In this stage following error arises " ERROR 4 [file unk.itp, line 793]:
No default Proper Dih. types

ERROR 5 [file unk.itp, line 827]:
No default Proper Dih. types

ERROR 6 [file unk.itp, line 860]:
No default Proper Dih. types

ERROR 7 [file unk.itp, line 869]:
No default Proper Dih. types

ERROR 8 [file unk.itp, line 890]:
No default Proper Dih. types

"
How to solve this issues?