martin@ubuntu:~/mono-projects/aarter$ wsdl AWSECommerceService.wsdl 
Mono Web Services Description Language Utility
System.NullReferenceException: Object reference not set to an instance of an object
in <0x00257> System.Xml.Serialization.XmlSchemaImporter:FindBuiltInType (System.Xml.XmlQualifiedName qname, System.Xml.Schema.XmlSchemaSimpleType st)
in <0x0049f> System.Xml.Serialization.XmlSchemaImporter:ImportClassSimpleType (System.Xml.XmlQualifiedName typeQName, System.Xml.Schema.XmlSchemaSimpleType stype, System.Xml.XmlQualifiedName root)
in <0x00152> System.Xml.Serialization.XmlSchemaImporter:ImportType (System.Xml.XmlQualifiedName name, System.Xml.Schema.XmlSchemaType stype, System.Xml.XmlQualifiedName root)
in <0x00154> System.Xml.Serialization.XmlSchemaImporter:ImportType (System.Xml.XmlQualifiedName name, System.Xml.XmlQualifiedName root, Boolean throwOnError)
in <0x000d0> System.Xml.Serialization.XmlSchemaImporter:GetTypeData (System.Xml.XmlQualifiedName typeQName, System.Xml.XmlQualifiedName root)
in <0x000ba> System.Xml.Serialization.XmlSchemaImporter:GetElementTypeData (System.Xml.XmlQualifiedName typeQName, System.Xml.Schema.XmlSchemaElement elem, System.Xml.XmlQualifiedName root, System.Xml.Serialization.XmlTypeMapping map)
in <0x000d8> System.Xml.Serialization.XmlSchemaImporter:ImportSequenceContent (System.Xml.XmlQualifiedName typeQName, System.Xml.Serialization.ClassMap cmap, System.Xml.Schema.XmlSchemaObjectCollection items, System.Xml.Serialization.CodeIdentifiers classIds, Boolean multiValue, System.Boolean isMixed)
in <0x0015a> System.Xml.Serialization.XmlSchemaImporter:ImportParticleContent (System.Xml.XmlQualifiedName typeQName, System.Xml.Serialization.ClassMap cmap, System.Xml.Schema.XmlSchemaParticle particle, System.Xml.Serialization.CodeIdentifiers classIds, Boolean multiValue, System.Boolean isMixed)
in <0x0001c> System.Xml.Serialization.XmlSchemaImporter:ImportParticleComplexContent (System.Xml.XmlQualifiedName typeQName, System.Xml.Serialization.ClassMap cmap, System.Xml.Schema.XmlSchemaParticle particle, System.Xml.Serialization.CodeIdentifiers classIds, Boolean isMixed)
in <0x000e3> System.Xml.Serialization.XmlSchemaImporter:BuildClassMap (System.Xml.Serialization.XmlTypeMapping map, System.Xml.XmlQualifiedName typeQName, System.Xml.Schema.XmlSchemaComplexType stype)
in <0x0005e> System.Xml.Serialization.XmlSchemaImporter:BuildPendingMaps ()
in <0x0017e> System.Xml.Serialization.XmlSchemaImporter:ImportMembersMapping (System.Xml.XmlQualifiedName[] names)
in <0x00415> System.Web.Services.Description.SoapProtocolImporter:ImportMembersMapping (System.Web.Services.Description.Message msg, System.Web.Services.Description.SoapBodyBinding sbb, SoapBindingStyle style, Boolean output, Boolean wrapped)
in <0x002f8> System.Web.Services.Description.SoapProtocolImporter:GenerateMethod ()
in <0x006b8> System.Web.Services.Description.ProtocolImporter:ImportPortBinding (Boolean multipleBindings)
in <0x003cb> System.Web.Services.Description.ProtocolImporter:Import (System.Web.Services.Description.ServiceDescriptionImporter descriptionImporter, System.CodeDom.CodeNamespace codeNamespace, System.CodeDom.CodeCompileUnit codeCompileUnit, System.Collections.ArrayList importInfo)
in <0x00029> System.Web.Services.Description.ServiceDescriptionImporter:Import (System.CodeDom.CodeNamespace codeNamespace, System.CodeDom.CodeCompileUnit codeCompileUnit)
in <0x00362> Mono.WebServices.SourceGenerator:GenerateCode (System.Collections.ArrayList descriptions, System.Collections.ArrayList schemas)
in <0x00924> Mono.WebServices.Driver:Run (System.String[] args)