S422 on mainframe when accessing migrated data sets

Problem:

When using Mainframe Access against migrated datasets, if it takes too long to restore the dataset(s), the job can fail with system error S422.   How can this be resolved

Resolution:

This could be caused because the MFA started task is timing out.

Try  setting the environment variable CCITIMEOUT. The default value is 2400 (2 minutes). Setting it to 4800 would double the wait time.

Often, changing the priority of the MFA task on the mainframe  makes a world of difference. It should be treated similarly to a CICS region.