$s=SOAP::Lite
  ->service('http://preview.etracker.de:8008/wsAPI?wsdl')
  ->on_fault(sub {
               my($soap, $res) = @_;
               ...
	     });

eval {
  ...
  $s->setFilter($ticket,
		$stat_id,
		'^-[^,]+,4853,',
		FILTER_TYPE_REGEXP);
  ...
};

##</code><code>##

'Unspecified namespace for type \'Struct[6]\'
<?xml version="1.0" encoding="UTF-8"?>

<SOAP-ENV:Envelope  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
 xmlns:ns4="urn:wsAPI"
 SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>

<SOAP-ENV:Fault>
<faultcode xsi:type="xsd:QName">SOAP-ENV:Client</faultcode>
<faultstring xsi:type="xsd:string">soap request contained incorrect number of 
parameters. method \'setFilter\' required 3 and request provided 
4</faultstring>
<faultactor xsi:type="xsd:anyURI"></faultactor>
<detail xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="Struct[6]" 
SOAP-ENC:offset="[0]">
<item>
<file 
xsi:type="xsd:string">/home/web/etracker.de/web/inc/pear/SOAP/Fault.php</file>
<line xsi:type="xsd:int">49</line>
<function xsi:type="xsd:string">pear_error</function>
<class xsi:type="xsd:string">pear_error</class>
<type xsi:type="xsd:string">::</type>
<args xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:anyType[5]" 
SOAP-ENC:offset="[0]">
<item xsi:type="xsd:string">soap request contained incorrect number of 
parameters. method \'setFilter\' required 3 and request provided 4</item>
<item xsi:type="xsd:string">Client</item>
<item/>
<item/>
<item xsi:type="xsd:string"></item></args></item>
<item>
<file 
xsi:type="xsd:string">/home/web/etracker.de/web/inc/pear/SOAP/Base.php</file>
<line xsi:type="xsd:int">199</line>
<function xsi:type="xsd:string">soap_fault</function>
<class xsi:type="xsd:string">soap_fault</class>
<type xsi:type="xsd:string">-&gt;</type>
<args xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:anyType[6]" 
SOAP-ENC:offset="[0]">
<item xsi:type="xsd:string">soap request contained incorrect number of 
parameters. method \'setFilter\' required 3 and request provided 4</item>
<item xsi:type="xsd:string">Client</item>
<item xsi:type="xsd:string"></item>
<item xsi:type="xsd:string"></item>
<item/>
<item/></args></item>
<item>
<file 
xsi:type="xsd:string">/home/web/etracker.de/web/inc/pear/SOAP/Server.php</file>
<line xsi:type="xsd:int">532</line>
<function xsi:type="xsd:string">_raisesoapfault</function>
<class xsi:type="xsd:string">soap_server</class>
<type xsi:type="xsd:string">-&gt;</type>
<args xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:string[4]" 
SOAP-ENC:offset="[0]">
<item xsi:type="xsd:string">soap request contained incorrect number of 
parameters. method \'setFilter\' required 3 and request provided 4</item>
<item xsi:type="xsd:string"></item>
<item xsi:type="xsd:string"></item>
<item xsi:type="xsd:string">Client</item></args></item>
<item>
<file 
xsi:type="xsd:string">/home/web/etracker.de/web/inc/pear/SOAP/Server.php</file>
<line xsi:type="xsd:int">398</line>
<function xsi:type="xsd:string">verifymethod</function>
<class xsi:type="xsd:string">soap_server</class>
<type xsi:type="xsd:string">-&gt;</type>
<args xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="Struct[1]" 
SOAP-ENC:offset="[0]">
<ns4:setFilter>
<ns4:ticket 
xsi:type="xsd:string">d60d0fb960c5bd28c4fa54bcfc4ed05a</ns4:ticket>
<ns4:stat_id xsi:type="xsd:string">StatisticUsagePageImpressions</ns4:stat_id>
<ns4:filter xsi:type="xsd:string">^-[^,]+,4853,</ns4:filter>
<ns4:c-gensym22 
xsi:type="xsd:int">4</ns4:c-gensym22></ns4:setFilter></args></item>
<item>
<file 
xsi:type="xsd:string">/home/web/etracker.de/web/inc/pear/SOAP/Server.php</file>
<line xsi:type="xsd:int">170</line>
<function xsi:type="xsd:string">parserequest</function>
<class xsi:type="xsd:string">soap_server</class>
<type xsi:type="xsd:string">-&gt;</type>
<args xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:anyType[2]" 
SOAP-ENC:offset="[0]">
<item xsi:type="xsd:string">&lt;?xml version=&quot;1.0&quot; 
encoding=&quot;UTF-8&quot;?&gt;&lt;soap:Envelope 
xmlns:wsdl=&quot;http://schemas.xmlsoap.org/wsdl/&quot; 
xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot; 
xmlns:SOAP-ENC=&quot;http://schemas.xmlsoap.org/soap/encoding/&quot; 
xmlns:xsd=&quot;http://www.w3.org/2001/XMLSchema&quot; 
xmlns:tns=&quot;urn:wsAPI&quot; 
soap:encodingStyle=&quot;http://schemas.xmlsoap.org/soap/encoding/&quot; 
xmlns:soap=&quot;http://schemas.xmlsoap.org/soap/envelope/&quot;&gt;&lt;soap:Body&gt;&lt;tns:setFilter&gt;&lt;ticket 
xsi:type=&quot;xsd:string&quot;&gt;d60d0fb960c5bd28c4fa54bcfc4ed05a&lt;/ticket&gt;&lt;stat_id 
xsi:type=&quot;xsd:string&quot;&gt;StatisticUsagePageImpressions&lt;/stat_id&gt;&lt;filter 
xsi:type=&quot;xsd:string&quot;&gt;^-[^,]+,4853,&lt;/filter&gt;&lt;c-gensym22 
xsi:type=&quot;xsd:int&quot;&gt;4&lt;/c-gensym22&gt;&lt;/tns:setFilter&gt;&lt;/soap:Body&gt;&lt;/soap:Envelope&gt;</item>
<item xsi:type="SOAP-ENC:Array" 
SOAP-ENC:arrayType="xsd:anyType[0]"/></args></item>
<item>
<file xsi:type="xsd:string">/home/web/etracker.de/web/wsAPI.php</file>
<line xsi:type="xsd:int">61</line>
<function xsi:type="xsd:string">service</function>
<class xsi:type="xsd:string">soap_server</class>
<type xsi:type="xsd:string">-&gt;</type>
<args xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="xsd:string[1]" 
SOAP-ENC:offset="[0]">
<item xsi:type="xsd:string">&lt;?xml version=&quot;1.0&quot; 
encoding=&quot;UTF-8&quot;?&gt;&lt;soap:Envelope 
xmlns:wsdl=&quot;http://schemas.xmlsoap.org/wsdl/&quot; 
xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot; 
xmlns:SOAP-ENC=&quot;http://schemas.xmlsoap.org/soap/encoding/&quot; 
xmlns:xsd=&quot;http://www.w3.org/2001/XMLSchema&quot; 
xmlns:tns=&quot;urn:wsAPI&quot; 
soap:encodingStyle=&quot;http://schemas.xmlsoap.org/soap/encoding/&quot; 
xmlns:soap=&quot;http://schemas.xmlsoap.org/soap/envelope/&quot;&gt;&lt;soap:Body&gt;&lt;tns:setFilter&gt;&lt;ticket 
xsi:type=&quot;xsd:string&quot;&gt;d60d0fb960c5bd28c4fa54bcfc4ed05a&lt;/ticket&gt;&lt;stat_id 
xsi:type=&quot;xsd:string&quot;&gt;StatisticUsagePageImpressions&lt;/stat_id&gt;&lt;filter 
xsi:type=&quot;xsd:string&quot;&gt;^-[^,]+,4853,&lt;/filter&gt;&lt;c-gensym22 
xsi:type=&quot;xsd:int&quot;&gt;4&lt;/c-gensym22&gt;&lt;/tns:setFilter&gt;&lt;/soap:Body&gt;&lt;/soap:Envelope&gt;</item></args></item></detail></SOAP-ENV:Fault>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
';