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<meta name="abstract" content="These topics summarize considerations for using the ILE C programming language to access remote VSAM data sets from an iSeries server." />
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<h1 class="topictitle1">ILE C considerations</h1>
<div><p>These topics summarize considerations for using the ILE C programming
language to access remote VSAM data sets from an <span class="keyword">iSeries™</span> server.</p>
<div class="section"><h4 class="sectiontitle">ILE C open considerations</h4><p>Because ILE C programming
language supports only sequential I/O, open operations will fail if KSDS or
VSAM paths are opened.</p>
</div>
<div class="section"><h4 class="sectiontitle">Open mode considerations</h4><p>This topic shows the open
mode considerations when using ILE C programming language.</p>
<div class="tablenoborder"><a name="rbae5xc400__rbae5tb1"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="rbae5xc400__rbae5tb1" width="100%" frame="border" border="1" rules="all"><caption>Table 1. Use ILE C programming language to open a CICS<sup>®</sup> file</caption><thead align="left"><tr><th rowspan="2" align="left" valign="bottom" width="46.85185185185185%" id="d0e57">ILE C open mode</th>
<th colspan="4" align="center" valign="bottom" id="d0e59">VSAM data
set organization</th>
</tr>
<tr><th align="center" valign="bottom" width="13.333333333333334%" id="d0e62">  ESDS</th>
<th align="center" valign="bottom" width="13.333333333333334%" id="d0e64">  RRDS</th>
<th align="center" valign="bottom" width="13.333333333333334%" id="d0e66">  KSDS</th>
<th align="center" valign="bottom" width="13.148148148148147%" id="d0e68">VSAM Path</th>
</tr>
</thead>
<tbody><tr><td align="left" valign="top" width="46.85185185185185%" headers="d0e57 ">r, rb</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e62 ">X</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e64 ">X</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e66 ">X</td>
<td align="center" valign="top" width="13.148148148148147%" headers="d0e59 d0e68 ">X</td>
</tr>
<tr><td align="left" valign="top" width="46.85185185185185%" headers="d0e57 ">w, wb</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e62 ">E</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e64 ">E</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e66 ">E</td>
<td align="center" valign="top" width="13.148148148148147%" headers="d0e59 d0e68 ">E</td>
</tr>
<tr><td align="left" valign="top" width="46.85185185185185%" headers="d0e57 ">w+, wb+, w+b, a+, ab+, a+b, r+, rb+, r+b,
a, ab</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e62 ">X</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e64 ">X</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e66 ">X</td>
<td align="center" valign="top" width="13.148148148148147%" headers="d0e59 d0e68 ">E</td>
</tr>
<tr><td align="left" valign="top" width="46.85185185185185%" headers="d0e57 ">a, ab</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e62 ">X</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e64 ">—</td>
<td align="center" valign="top" width="13.333333333333334%" headers="d0e59 d0e66 ">—</td>
<td align="center" valign="top" width="13.148148148148147%" headers="d0e59 d0e68 ">—</td>
</tr>
<tr><td colspan="5" align="left" valign="top" headers="d0e57 d0e59 d0e62 d0e64 d0e66 d0e68 "><p>Where:</p>
<dl><dt class="dlterm">X</dt>
<dd>Open mode is allowed.</dd>
<dt class="dlterm">E</dt>
<dd>Open mode is allowed by ILE C programming language, but the open fails
when accessing the VSAM data set.</dd>
<dt class="dlterm">—</dt>
<dd>Open mode is not applicable.</dd>
</dl>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbae5lc.htm" title="iSeries application programmers using ILE COBOL, ILE C, iSeries System/36-Compatible RPG II, or ILE RPG languages should be aware of the information in these topics.">Language considerations for iSeries server and CICS</a></div>
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