The server committed a protocol violation
The EXCEL.EXE.config file is required and is
missing. Section=ResponseHeader Detail=CR must be followed by LF.
You must create the EXCEL.EXE.config file, copy it to the same location as IBM® Cognos® Analysis for Microsoft Excel and add the following lines:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.net>
<settings>
<httpWebRequest useUnsafeHeaderParsing="true" />
</settings>
</system.net>
</configuration>