HFP01040I DATA SET `dsname` NOT FOUND.

Explanation
Dynamic allocation returned an error when allocating the data set named
dsname. The data set was not found.

System action
If the data set is essential, the process terminates with error.

User response
The data set name comes from the MDALIB or from the RECON. Correct the data set name in those
places and rerun the job.