Converting controller application programs from Finance to SLU P

IMS does not scan output for the control character sequence when sending output to a secondary logical unit type P. Therefore, the implied option is NOSCAN. If an application program uses MFS, it must be converted to use the distributed presentation management (DPM) option, which divides responsibility for message formatting between MFS and a user program residing within the logical unit. With the use of the DPM option, physical terminal characteristics are not defined to MFS. MFS formats and presents data to the user program component of the SLUTYPEP. The user program must complete the formatting, if necessary, and present the data to a physical device.

To execute correctly when defined to IMS as SLU P, existing remote user-written programs that run in a Finance controller must be converted as follows:

• Any input message headers must be converted to SLU P message headers.
• Any input message indicating only begin-bracket must also indicate change-direction.
• If the TERMINAL macro SCAN option is specified, the Finance controller application program must be converted to detect and process the same options provided by the SCAN option.
• If the controller application program uses MFS, the remote application must be converted to use the device-independent MFS distributed presentation management option.
• When converting from Finance-specific MFS to DPM, the MFS format descriptions must be redefined and recompiled using the IMS MFS Language utility.