Solution : https://service.sap.com/sap/support/notes/333416 (SAP Service marketplace login required)
Key words : 
additional key words va02, error message iq099 occurs, function group ibinf, function module ib_ibin_get_regist_moment, error occurs, runtime error, production order, implement note 305970, solution implement, configuration
Related Notes : 
       
| 305970 | Observer registration comes too late |