PE only
   the file has native format and no mpp header records. </dd>
<br>
<br>
<dt>
<b>INPUT</b>
</dt>
<dd>
<table border="0">
<tr>
<td valign="top" align="left"><tt>file&nbsp;&nbsp;&nbsp;</tt></td><td>   name of the file to be opened <br>&nbsp;&nbsp;&nbsp;<span class="type">[character]</span></td>
</tr>
<tr>
<td valign="top" align="left"><tt>action&nbsp;&nbsp;&nbsp;</tt></td><td>   action to be performed: can be 'read' or 'write' <br>&nbsp;&nbsp;&nbsp;<span class="type">[character]</span></td>
</tr>
</ta