gtpi1m5qSystem Installation Support Reference

Virtual Reader

The virtual reader exit, UELB, makes it possible to perform the following operations on a virtual reader: OPEN, READ NEXT RECORD, CLOSE.

UELB is called by the common access device routine (CEL6), when the ddname indicates the virtual reader.

Input

R6
Parameter list containing the following:

Programming Considerations

Return Values

R6 should contain one of the following return codes:

 0 
The operation performed successfully.

 1 
Error performing the operation.

 2 
End of device.