A user reports getting the following error on JIRA Standard, when trying to get a project listing via SOAP:

SEVERE: Unexpected error executing queued command.
AxisFault
faultCode:

{http://schemas.xmlsoap.org/soap/envelope/}

Server.userException
faultSubcode:
faultString: java.lang.UnsupportedOperationException: There is no implementation of com.atlassian.jira.issue.security.IssueSecuritySchemeManager in this edition of JIRA. This should not normally occur. Please file a bug report
faultActor:
faultNode:
faultDetail:
{}faultData:null

{http://xml.apache.org/axis/}

hostname:168.jfax.com

java.lang.UnsupportedOperationException: There is no implementation of com.atlassian.jira.issue.security.IssueSecuritySchemeManager in this edition of JIRA. This should not normally occur. Please file a bug report
at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:221)
at org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:128)
at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1077)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1712)
at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:667)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:225)
at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:645)
at org.apache.axis.Message.getSOAPEnvelope(Message.java:424)
at org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
at org.apache.axis.client.AxisClient.invoke(AxisClient.java:173)
at org.apache.axis.client.Call.invokeEngine(Call.java:2737)
at org.apache.axis.client.Call.invoke(Call.java:2720)
at org.apache.axis.client.Call.invoke(Call.java:2396)
at org.apache.axis.client.Call.invoke(Call.java:2319)
at org.apache.axis.client.Call.invoke(Call.java:1776)
at localhost.rpc.soap.jirasoapservice_v2.JirasoapserviceV2SoapBindingStub.getProjects(JirasoapserviceV2SoapBindingStub.java:887)
...

From this stacktrace, it looks like our SOAP code refers to an Enterprise-only class, and so will not work on Professional or Standard.