I have these errors with Optistruct
*** ERROR 14: Missing property # 62 referenced by CQUAD4 # 26548.
*** ERROR 14: Missing property # 62 referenced by CQUAD4 # 26549.
*** ERROR 14: Missing property # 62 referenced by CQUAD4 # 26550.
i'm sure that the component of this QUAD element had already a property . any suggestion please