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I am having a problem with Sketchup Pro file saving once I run the Maxwell Ruby UI.
As an example, let's say I have a file open in Sketchup named Test.skp.
I have autosave set for 30 minutes in Sketchup.
I edit the file and autosaves are done.
I save the file and exit Sketchup, thus closing the maxwell UI.
Looking at the file directory, I have the following:

Test.skp
0.skb
1.skb
2.skb
3.skb, etc.

Each 30 minute autosave is incremental AND the last file is the last saved edit version of Test.skp.

If I open the Test.skp file, it will be the version I began with at the earliest date and time of the edit session.

I have tracked it down to the process named agcp.exe *32 placing a file lock on the original file, thus forcing Sketchup to incrementally save.
This appears to be from MS Silverlight.
I suspect each file increment is locked also, thus compounding the problem.

I have to close the agcp.exe *32 process in Task Manager before I can rename and change file names since they continue to remain locked.

I recently update the OS to Windows 7 Pro 64bit from 32bit. Could this be an issue?
Otherwise, I am at a loss as to how to remedy the problem.

I am going to move this to the SketchUp forum.

[I guess maybe I can't -- Mihai, could you please do that for me?]

On the topic, you might check this KB. Sounds like a possibility, but it only mentions SL4; if you're on SL4, you could try using SL5 instead (since you're on Windows). Other than that, I can't tell you much, other than to try uninstalling/reinstalling Silverlight.

Thanks JD,
I do have Silverlight 5 on the PC.

Well, for what it's worth, what I see here (also on SL5) is that agcp.exe starts up and runs for about 10 seconds, when Silverlight is initially started in the SketchUp process, before then exiting and disappearing from Task Manager. According to that KB, this is the expected behavior, so I'd follow through with the troubleshooting steps given there, to try and see what's preventing it from shutting down.

Seems Microsoft and I have tracked the offender down to a printing audit program that runs in startup.
Just letting you know the outcome.

Thanks much for the follow-up.

I've been looking for a solution to this issue as well and just came across this thread with the recent follow up.

Unfortunately the KB doesn't say anything about a resolution and I'm already on Silverlight 5.1.10411.0.

Any other thoughts as to a solution? Right now the only way to save my SketchUp file is to do a SaveAs and give it a new name or let it save the SKB and rename later.

The reason the KB doesn't mention any specific solution is that there isn't one -- it will be different in each individual situation. The trick will be to identify which application has injected itself into the agcp.exe process, and is not allowing it to exit. Suspects might generally be antivirus and the like, since they fit the profile of an application that would want to hook into everything, for purposes of monitoring, but as hwolfejr's experience indicates, it could really be anything.