Invalid Parameter exception while opening Assembly. How to deal?

[Anonymous]

The exception message is: 'The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))'.

I'm trying to open Assembly using next code:

NameValueMap options = inventorApplication.TransientObjects.CreateNameValueMap();
options.Add("ExpressModeBehavior", "OpenExpress");

assembly = (AssemblyDocument)inventorApplication.Documents.OpenWithOptions(
    assemblyFileName, // full/path/to/assembly.iam
    options
);

And it works well except for one case.

When I create subassembly in the root assembly (and in this subassembly add some parts) using Assemble->Create button, this code gets this exception while trying open saved subassembly file.

If I create subassembly using File->New->Assembly, this code works as expected.

Does someone have any idea why it throws an exception and how to deal with this? 🙂

Thanks! 🙂

[WCrihfield]

It looks like you may be using C#, which I'm not very familiar with, but if you are trying to open the sub-assembly of an already active parent assembly, the sub-assembly, technically, is already open, but perhaps just not visibly.  But if you are opening the parent assembly in 'express mode', the sub-assembly may only be partially loading, to conserve system resources (memory), and could be blocking your interactions with that sub-assembly.

If you open things without the express mode, will it work then?

[Anonymous]

Technically, when I open subassembly, parent assembly already closed. I keep open only one assembly per time, collect necessary data, and then close the assembly.

Looks like the difference is in the saving process. If I just open "problemed" subassembly and just press ctrl+s, and then run my addin again - all goes well.

Hmm... maybe it just doesn't save an assembly in express mode while creating using "Assemble->Create"... Will check this 🙂

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@WCrihfield wrote:

If you open things without the express mode, will it work then?

---

Anyway, I need data from express mode...

[Anonymous · Accepted solution]

Yep, Inventor doesn't save Cached Graphics in case of Create button...

As a solution (temporary?), check Cached Graphics status through FileManager.GetExpressGraphicsStatus and if not cached, open and save assembly with cached.