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1792296 - CST – Error: Operation failed (rc=1) Message no. ICM006


  • CST – Error: Operation failed (rc=1) Message no. ICM006,
  • Cannot activate the SMTP service in transaction SMICM,
  • Receive the error message "Operation failed (rc=1)" - Message number ICM006,
  • There is a business need to set the profile parameter rdisp/start_icman to TRUE as per SAP Note 757804 - Cannot process message in SAP system.:



Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.



  • SAP NetWeaver
  • SAP Web Application Server for SAP S/4HANA
  • ABAP PLATFORM - Application Server ABAP


ABAP platform all versions ; SAP NetWeaver all versions ; SAP Web Application Server for SAP S/4HANA all versions


SMICM, Service, Activate, Port, parameter, SMTP, RZ10, CST, client server technology, kernel, application server, instance,

Whereas it should have been this: , KBA , BC-CST-IC , Internet Communication Manager , BC-SRV-COM , Communication Services: Mail, Fax, SMS, Telephony , Problem

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