IGZCPCO
IGZCPCO is a COBPACK, a load module that contains system-specific COBOL library routines grouped by the linkage editor.
Hints
IBM recommends tailoring the COBPACKs to
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shorten load time by reducing size (when possible)
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minimize VS required for an application by eliminating seldom-used routines residing in main storage
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eliminate routines that use 24-bit addressing allowing COBPACK to load above the 16M line
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reduce contents of shared storage
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include helpful run-time language message routines
Reference Sources
VS COBOL II, Installation and Customization for MVS, Release 3.2, SC26-4048.