All of the HPC calls place a 4 byte return code at the start of the return
block. The generic values are
&0000 The operation was successful. &0001 The operation failed. The exact meaning of this depends upon the reason code, but in general it indicates that the rest of the return block is invalid. &FFFF Service or reason code is unknown. See the individual reason codes for details of any other codes returned, and any contents of the remainder of the return block. |
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