DFS0426I PHYSICAL I/O ERROR IN STEP stepname prcstpnm
Explanation
A physical input or output error occurred on a database used by step stepname procedure with stepname prcstpnm. Message DFS0451I (or DFS0451A) was issued indicating the nature of the error. In addition, the step is abnormally terminating. The IOEROPN parameter of the PSB for this step requested issuing an abend 0451, but the step terminated abnormally for some other reason. An abend 0451 was not be issued.
Programmer response
Take the appropriate action to correct the conditions that caused the I/O error and the abend condition.