AN I/O ERROR OCCURRED IN C1SR1100. RC=348

Document ID : KB000122144
Last Modified Date : 03/12/2018
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Issue:
When trying to create a report I am getting the following error: 

AN I/O ERROR OCCURRED IN C1SR1100.  RC=348 
***

What does this mean and how can I resolve this? 
Resolution:
The message 'AN I/O ERROR OCCURRED IN C1SR1100. RC=348' is normally caused by an incorrect unit name specified in the endevor defaults panel, under 'work dataset allocation information'. The defaults panel is accessed via option 0 (defaults) in the endevor primary options menu, or via option 'D' (dialog defaults) from the Quickedit main panel.