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Exception: "Method xyz can not be reflected." in .Net Connector 2.0

Posted on Oct 07, 2004 at 06:18 AM 128 Views

Hi,

I have generated a proxy class with two RFC's. The first RFC has a table parameter with the same name and type as an export parameter of the second RFC.

When I create an object of the proxy class with "SAPProxy sap = new SAPProxy();" I get an exception "Method SAPProxy.Z_Rfc_Aenr_Suchen_Via_Ccart can not be reflected." where "Z_Rfc_Aenr_Suchen_Via_Ccart" is the name of the first RFC and the following inner exception

"The XML element named 'AENR_--5fRFC' from namespace '' references distinct types ZAENR_RFC and ZAENR_RFCTable. Use XML attributes to specify another XML name or namespace for the element or types.".

The generated code for the parameter of the first RFC is:

[RfcParameter(AbapName = "AENR_RFC",RfcType=RFCTYPE.RFCTYPE_ITAB, Optional = false, Direction = RFCINOUT.INOUT)]

[XmlArray("AENR_--5fRFC", IsNullable=false, Namespace="")]

[XmlArrayItem("item", IsNullable=false)]

ref ZAENR_RFCTable Aenr_Rfc)

and for the second RFC:

[RfcParameter(AbapName = "AENR_RFC",RfcType=RFCTYPE.RFCTYPE_STRUCTURE, Optional = true, Direction = RFCINOUT.OUT)]

[XmlElement("AENR_--5fRFC", IsNullable=false, Namespace="")]

out ZAENR_RFC Aenr_Rfc)

now when I change one of the XML Names from "AENR_ 5fRFC" to "AENR_ 5fRFC1" in the generated proxy class, the proxy class instantiates correctly, but that should not be the solution.

Is this a bug in .Net Connector 2.0? In Version 1 I didn't get this exception although the parameters where generated with the same name "AENR_RFC" (not "AENR_--5fRFC")

Thanks!

Markus

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    author's profile photo Reiner Hille-Doering
    Reiner Hille-Doering
    Posted on Oct 07, 2004 at 07:53 AM
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    Yes, sorry again a bug.

    I was fixing a special case where you have strange characters in ABAP names that are not supported in XML and forgot "_" which is an allowed char.

    In the moment you can fix it by replacing "_--5f" with "_", which should be perfectly Ok.

    I'll try posting a fix soon.

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    • Reiner Hille-Doering Former Member
      Oct 13, 2004 at 10:55 AM

      A fix for the problem is now available in OSS / SAP Service Marketplace note 506603. As the note is maintained in german, it might need time until the english version is up-to-date. In the meantime just open the german version of the note, take the attached ZIP files and extract it to your "%program files%\Microsoft Visual Studio .NET 2003\Common7\IDE" directory.

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  • author's profile photo Former Member
    Former Member
    Posted on Oct 07, 2004 at 08:20 AM
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    Hello Reiner,

    that explains the strange XML-Names, but it didn't solve my problem. When changing the xml name of one parameter to a unique name it works, but in NCO 1 it worked without changing the name.

    Markus

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  • author's profile photo Former Member
    Former Member
    Posted on Oct 07, 2004 at 08:55 AM
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    Hi,

    when comparing the proxy classes generated with NCO 1 and version 2, I found the difference that probably causes the problem.

    Each parameter of a RFM in Version 2 is marked with [XmlElement("XYZ", IsNullable=false, Namespace="")]. In the proxy class generated with version 1 "Namespace="" " is missing.

    Removing the Namespace property solves the problem. Under some circumstances the Namespace property in combination with my special RFM's - parameter obviously causes the reflection problem.

    What is the difference between setting the Namespace to "" and omitting it?

    Thanks!

    Markus

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