(CGNS Documentation Home Page)
(Steering Committee Charter)
(Overview and Entry-Level Document)
(Standard Interface Data Structures)
(SIDS File Mapping Manual)
(CGIO User's Guide)
(Parallel CGNS User's Guide)
(CGNS Tools and Utilities)
(Frequently Asked Questions)
(Example Computer Codes)
(Overview of the SIDS)
(Guideline for PLOT3D Variables)
The API has an extensive number of checks for errors, relating both to
invalid data input as well as SIDS-noncompliance.
However, it is not guaranteed that the API will catch all problems prior
to reaching the core level. Even then, additional errors can arise due
to I/O or invalid input. The list of errors that can arise in the CGIO
or database manager core routines may be found in the
CGIO User's Guide.
If an error occurs, the message given by API or core routine
should hopefully be descriptive enough to point to the source of the
One known problem that can occur, which is not so much a problem as it
is a restriction, relates to links.
If a user makes a link from one CGNS file to another, then the linked
file must have write permission if the user wishes to open the
linking file in CG_MODE_MODIFY or CG_MODE_WRITE mode.
In other words, opening a CGNS file in CG_MODE_MODIFY or
CG_MODE_WRITE mode implies that the entire CGNS
hierarchy, including links (since they are transparent), is accessible
in that mode.