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The Question is:
I run a program created, without change, from
tcpip$examples:tcpip$tcp_client_qio.c
It fails on sys$assign for TCPIP$DEVICE. This is a system logical defined as
_BG0:.
Other socket based TCPIP programs work Ok.
Also I used to use an excellent site called 'Digital TCP-IP Services for Open
VMS' which described the various Socket routines. This now contains TCPIP
management information. Is there now a site which describes basic VMS Socket
programming?
Mark Battle
The Answer is :
That the application fails on an $assign call is unfortunately
insufficient information here. The OpenVMS Wizard is quite often
unable to answer a generic problem statements, as the range of
potential causes for generic problem statements is, well, huge.
(There are a number of reasons why an $assign call might fail.
$assign returns specific errors, of course, and application code
is free to process these errors according to local needs -- the
use of macros such as $VMS_STATUS_SUCCESS() -- from stsdef.h --
can be useful as a generic error-handling mechanism.)
Do also consider providing details of product versions and the
ECO level, such as the version of TCP/IP Services -- and if you
are not current, do seriously consider upgrading to the most
current release and ECO. In this case, your OpenVMS VAX version
is old, and your TCP/IP Services version is unspecified but -- if
it matches the OpenVMS VAX version -- it is likely also outdated.
ECO kits are available for OpenVMS VAX and for TCP/IP Services.
Please seriously consider at least the ECO, if not the upgrade
and the ECO.
The TCP/IP Services documentation is available at the main OpenVMS
documentation website, and the C and $qio APIs are documented in the
available TCP/IP Services manuals at the main OpenVMS documentation
website. (The current C run-time library (RTL) manual is also now
directly part of the OpenVMS documentation set, having been migrated
from the C compiler documentation into the OpenVMS documentation.)
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