I think I am setting correct values for the campaign criteria type, Proximity/ But I am getting Invalid_Proximity_Address. Please find below the SOAP request and response.
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<soapenv:Header>
<ns1:clientCustomerId>9571572507</ns1:clientCustomerId>
<ns1:developerToken>REDACTED</ns1:developerToken>
<ns1:userAgent>unknown (AwApi-Java, AdWords-Axis/4.6.0, Common-Java/4.6.0, Axis/1.4, Java/1.8.0_202, maven)</ns1:userAgent>
<ns1:validateOnly>false</ns1:validateOnly>
<ns1:partialFailure>false</ns1:partialFailure>
</ns1:RequestHeader>
</soapenv:Header>
<soapenv:Body>
<operations>
<operator>ADD</operator>
<operand>
<campaignId>9747132435</campaignId>
<ns2:radiusDistanceUnits>KILOMETERS</ns2:radiusDistanceUnits>
<ns2:radiusInUnits>10.0</ns2:radiusInUnits>
<ns2:address>
<ns2:postalCode>2018</ns2:postalCode>
<ns2:countryCode>AU</ns2:countryCode>
</ns2:address>
</criterion>
</operand>
</operations>
</mutate>
</soapenv:Body>
</soapenv:Envelope>
94571 [main] INFO c.g.a.a.a.l.c.A.soapXmlLogger [] - SOAP response:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<soap:Header>
<requestId>0005a1edb1c0ad410a62e7142c0fb038</requestId>
<serviceName>CampaignCriterionService</serviceName>
<methodName>mutate</methodName>
<operations>1</operations>
<responseTime>279</responseTime>
</ResponseHeader>
</soap:Header>
<soap:Body>
<soap:Fault>
<faultcode>soap:Client</faultcode>
<faultstring>[CriterionError.INVALID_PROXIMITY_ADDRESS @ operations[0].operand.criterion.address]</faultstring>
<detail>
<message>[CriterionError.INVALID_PROXIMITY_ADDRESS @ operations[0].operand.criterion.address]</message>
<ApplicationException.Type>ApiException</ApplicationException.Type>
<fieldPath>operations[0].operand.criterion.address</fieldPath>
<fieldPathElements>
<field>operations</field>
<index>0</index>
</fieldPathElements>
<fieldPathElements>
<field>operand</field>
</fieldPathElements>
<fieldPathElements>
<field>criterion</field>
</fieldPathElements>
<fieldPathElements>
<field>address</field>
</fieldPathElements>
<trigger/>
<errorString>CriterionError.INVALID_PROXIMITY_ADDRESS</errorString>
<ApiError.Type>CriterionError</ApiError.Type>
<reason>INVALID_PROXIMITY_ADDRESS</reason>
</errors>
</ApiExceptionFault>
</detail>
</soap:Fault>
</soap:Body>
</soap:Envelope>