Input response requirements

The following table summarizes input requirements for requesting responses for all types of data transmission between a workstation and IMS.

Table 1. Input response requirements by message type
Data type Responses accepted

(ACK option)

 Responses accepted

(OPTACK option)
Update transaction DR21 Exception DR1 or exception DR23 DR1 or DR2 Exception DR1 or exception DR21, 2
Recoverable-inquiry transaction DR21 Exception DR1 or exception DR23 DR1 or DR2 Exception DR1 or exception DR21, 2
Irrecoverable-inquiry transaction DR1 or DR2 Exception DR1 or DR21 DR1 or DR2 Exception DR1 or exception DR21, 2
Fast Path transaction4 N/A DR1 or DR2 Exception DR1 or exception DR21, 2
IMS message switch DR21 DR1 or DR2 Exception DR1 or exception DR21, 2
IMS command DR1 or DR2 Exception DR1 or DR21 DR1 or DR2 Exception DR1 or exception DR21, 5
VTAM® command or indicator DR11 DR11
SLU P system MFS control request DR1 or DR2 Exception DR1 or DR21 DR1 or DR2 Exception DR1 or DR21
Notes:
  1. Recommended or required response.
  2. Fast Path users should always use OPTACK option with exception DRx.
  3. With CD only for the commands /DIS, /RDIS, and /FOR.
  4. ETO users should always use OPTACK option.
  5. With Change Direction (CD) only.