Unable to edit old versioned file in KM

Question

Hi,
I have a requirement wherein I need to edit older versioned file in KM programatically. I have got the older version file but I am not able to edit it and it gives an error; "*this collection does not support workspace creation".
Supopse, I have versioning enabled on /documents/Public documents/test folder programatically. I created new version of a file say test.txt in it through code. This much is working fine. But, editing of older versioned file is creating problem. I used the below code:
IVersionHistory iVersHistory = fileResource.getVersionHistory(); // fileResource refers to test.txt
wdComponentAPI.getMessageManager().reportSuccess("IVersionHistory SIZE: " +iVersHistory.size());
IResource resourceElement = null;
name=fileResource.getName();
IResource R1v5VCR=null;
for(int i=0; i < iVersHistory.size(); i++)
  resourceElement = iVersHistory.get(i);
  list.add(resourceElement);
  if(resourceElement.getName().equalsIgnoreCase("test(3).txt"))
    //resourceElement.setAsCurrentVersion();
   ICollection collection = folder; // refers to /documents/Public documents/test folder
   wdComponentAPI.getMessageManager().reportSuccess("Reached "+collection.getRID());
   if( collection.isA(IExtendedCollection.class) )
     wdComponentAPI.getMessageManager().reportSuccess(" extending ");
     IExtendedCollection extendedCollection = (IExtendedCollection)collection.as(IExtendedCollection.class); 
     ICollection workspace = extendedCollection.createWorkspace("myworkspace", null); ---> Error on this line
     wdComponentAPI.getMessageManager().reportSuccess("Created test folder workspace ");
     IExtendedCollection Wa = (IExtendedCollection)workspace.createCollection("test",null).as(IExtendedCollection.class);
     R1v5VCR = Wa.createVersionControlledResource(resourceElement.getRID(), resourceElement.getName(),null);
     wdComponentAPI.getMessageManager().reportSuccess("Created New versioned resource ");
    // more code but unreachable code
For editing a revision resource (i.e older version file), we have to create workspace on extendedCollection.
I went through this URL: [http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/com.sap.km.cm.docs/library/netweaver/netweaver-developers-guide-2004s/NetWeaverDevelopersGuide2004s_Documents/KM_articles_new/howto/rf/client_api/rf_client_api_sdn.html|http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/com.sap.km.cm.docs/library/netweaver/netweaver-developers-guide-2004s/NetWeaverDevelopersGuide2004s_Documents/KM_articles_new/howto/rf/client_api/rf_client_api_sdn.html]
Let me know if you have any solution or suggestion in this context.
Thanks,
Udit

Answer 1

Hi Julian,
Tjanks for the reply. But I already moved with that approach. I was finally able to create the workspace and a new versioned resource inside the workspace. But I get a new error on checkout of the resource: "subsequent checkin is expected to cause a fork!"
Below is the code snippet used:
IResource R1v5VCR=null;
IResource resourceElement = iVersHistory.get(5); // file(5).txt is coming properly
IResourceMetadata resourceMetadata=(IResourceMetadata)resource.as(IResourceMetadata.class);
IRidSet ridSet=resourceMetadata.getWorkspaceCollectionSet();
IRidIterator iter=ridSet.iterator();
RID workRID=null;
while(iter.hasNext()){
workRID=iter.next();}
ICollection newWorkSpace=(ICollection)ResourceFactory.getInstance().getResource(workRID,resourceContext);
wdComponentAPI.getMessageManager().reportSuccess("Created folder workspace ");
IExtendedCollection Wa =(IExtendedCollection)newWorkSpace.createCollection("test",null).as(IExtendedCollection.class);
R1v5VCR = Wa.createVersionControlledResource(resourceElement.getRID(),resourceElement.getName(),null);
R1v5VCR.checkOut(); --> Error on this line
So, this issue is taking time now and I want to resolve it soon.
Regards,
Udit