This chapter tells you how to use system error messages as output
from your applications. It explains:
Accessing CATALOG.PUB.SYS, the CM error message
catalog, using:
HPFOPEN to open the catalog
GENMESSAGE to read and output message
FCLOSE to close the catalog
Accessing SYSCAT.PUB.SYS, the NM error message catalog
using:
CATOPEN to open the catalog
CATREAD to read and output messages
CATCLOSE to close the catalog
CATALOG.PUB.SYS contains the CM error messages. It was
formatted with the MAKECAT.PUB.SYS program. The catalog is
opened and closed with the HPFOPEN and FCLOSE
intrinsics; messages are read with the GENMESSAGE
intrinsic. GENMESSAGE allows you to access the message
catalog and substitute parameters in the message.
SYSCAT.PUB.SYS contains the NM error messages. This
message catalog was formatted with the GENCAT.PUB.SYS
program. You use the catalog intrinsics to open, read from, and close
this catalog. They are CATOPEN, CATREAD, and
CATCLOSE. CATREAD allows parameter substitution
where applicable.
Both CATALOG.PUB.SYS and SYSCAT.PUB.SYS may be accessed
from Native Mode. Title not available shows the catalogs and the intrinsics
that access them.
Figure 5-1 Accessing System Error Messages
![[Accessing System Error Messages]](img/F0501.gif)
