Return Codes from IMGLIB

Return codes from the IMGLIB macro with the OPEN parameter are as follows:

Return Code	Meaning
0 (X'00')	Operation successful.
4 (X'04')	Either the volume containing SYS1.IMAGELIB is not mounted or a required catalog volume is not mounted.
8 (X'08')	Either SYS1.IMAGELIB does not exist on the volume to which the catalog points, or SYS1.IMAGELIB is not cataloged.
12 (X'0C')	An error occurred in reading the catalog or VTOC.

BLDL and LOAD are the only macros that can refer to the DCB built by the IMGLIB macro.