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HP OpenVMS Systemsask the wizard |
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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old, and your TCP/IP Services version is unspecified but -- if it matches the OpenVMS VAX version -- it is likely also outdated.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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