DFR3206E UNABLE TO SUCCESSFULLY OPEN DDNAME=IMSACB`x`

Explanation
 The data set IMSACBx (where
x is A or B) cannot be opened.

System action
 The job ends with an abend code of U3206.

User response
 Check if the ACB library that was used by the IMS to be recovered is specified
correctly in the DD statement. Correct the cause of open failure and
rerun the job.