Problems with UIMs

For information on converting and testing UIMs, refer to z/OS MVS Device Validation Supportz/OS MVS Device Validation Support.

The following explanations apply to UIMs provided by the installation and to UIMs provided by IBM.

Messages during initialization of HCD

Internal logic errors in UIMs are primarily found during the initialization of HCD. Refer to Problems during initialization of HCD for information on how to proceed in case of initialization problems.

UIM problems after initialization of HCD

Internal logic errors in UIMs may also be discovered:

• During the definition of a device (as a string like ?PARMnn? on the Device Parameter Feature panel). Message CBDA381I indicates that you may have installed a back-level UIM.
• On the Installed UIMs panel when a UIM is flagged in error. In this case messages CBDA070I or CBDA096I may be issued. Message CBDA070I means that the UIM does not match the corresponding UDT. Message CBDA096I means an unresolvable conflict between a VM and MVS UIM.

You can use the message log, together with SYSUDUMP and HCDTRACE to find the error in the UIM that failed.

If the error relates to an installation-provided UIM, make appropriate corrections. For information on converting UIMs, refer to z/OS MVS Device Validation Supportz/OS MVS Device Validation Support .

If the error relates to a UIM provided by IBM, report the problem.

Table 27 and Table 28 show what the search argument and the problem data could look like.