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<h4 class="subsection">1.6.2 i/o Errors</h4>

<p><a name="index-i_002fo-errors-59"></a>These error messages are prefaced with the name of the
application. A further explanation as to the
<a name="index-g_t_0040code_007bstrerror_007d-60"></a>reason, obtained from the standard <code>strerror()</code> utility, is
appended to the messages below if possible.

     <dl>
<dt><var>application-name</var><code>: can't read </code><var>filename</var><dd><a name="index-file-names-61"></a><a name="index-g_t_0040code_007bcan_0027t-read_007d-62"></a><a name="index-environment-63"></a><a name="index-g_t_0040code_007bAVMINPUTS_007d-64"></a>A file was not able to be opened for reading, typically because it was
not found or because the user does not have permission. The file name is
displayed with special characters expanded but without any default
extensions or search paths that may have been tried. If you think a file
exists and should have been found, there may be a problem with your
<samp><span class="env">AVMINPUTS</span></samp> environment variable (<a href="Environment.html#Environment">Environment</a>). 
<br><dt><var>application-name</var><code>: can't write </code><var>filename</var><dd><a name="index-g_t_0040code_007bcan_0027t-write_007d-65"></a>A file was not able to be opened for writing. 
<br><dt><var>application-name</var><code>: can't write to </code><var>filename</var><dd>A file was successfully opened for writing but became impossible to
write thereafter. 
<br><dt><var>application-name</var><code>: can't spawn </code><var>command</var><dd><a name="index-shell-66"></a><a name="index-expect-67"></a><a name="index-libexpect-68"></a><a name="index-g_t_0040code_007bcan_0027t-spawn_007d-69"></a><a name="index-g_t_0040code_007bexp_005fpopen_007d-70"></a><a name="index-spawning-processes-71"></a>An attempt to execute a shell command on behalf of an interactive
application failed during the <code>exp_popen()</code> call to the
<code>libexpect</code> library. 
<br><dt><var>application-name</var><code>: can't close </code><var>filename</var><dd><a name="index-g_t_0040code_007bcan_0027t-close_007d-72"></a>A call to the standard C procedure <code>fclose()</code> failed due to
unforeseen circumstances. The error is non-fatal but the file should be
checked for missing data. 
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