For a migration project I have to copy the documents from one filenet(source) to another(target) keeping the same document ids.

I saw that when creating a document it is possible to create a document by passing the id, but I can't find anything to create a version of a document by setting the id as well.

How can I do?

To create document I use:

Factory.Document.createInstance(objectStoreImport, symbolicName, docId, versionSeriesId, reservationType);

How can I create a document version keeping the same id of the filenet source ?

I think yyou are looking at the wong method. To create a new version of a document you need to check it out. The checkout method (inherited from versionable) has an optional Id for the reservation object.

I think this Id will get the new object id of the (then) checked in document.

/gerold