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WCrihfield
in reply to: meGVGMF

Hi @meGVGMF.  The online help documentation for that API method (Documents.Open) does not specify Synchronous, or Asynchronous, but does hint at the use of 'DeferUpdate' type settings that may be in use.  Generally speaking, when working with either an assembly or a drawing, by default, all referenced documents are invisibly either 'initiated' or opened in the background (invisibly) already.  The exception to this may be if you are using component suppression (which is recorded by LOD's or ModelStates), and all instances of components that represent some of the referenced documents are suppressed.  In that case, you may have to open that document.  If you have certain application or document options set to defer updates, that may be causing the updates not to happen until you manually click/execute the update or rebuild tools/methods.  Also, in some cases, you may just need to either update the documents after you edit them, or at least update their parent sub-assembly after making edits to its component documents, in order to see the modifications at the top level.  There are a few possibilities.

Wesley Crihfield

EESignature

(Not an Autodesk Employee)