I downloaded a packaged lot the other day and opened clean installer. It went through my downloads folder fine until all of a sudden it stopped and I got this error:

System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values. Paramater name: Index was out of range. Must be non-negative and less than the size of the collection.

and then a bunch of other weird stuff, lol.

So I had to go through all my downloads to find the problem file, and I took it out. But the thing is, I just downloaded a set of items from a very reputable group, the medieval set, which seem to work fine with everyone else. I don't have any EP but that isn't supposed to matter. For a few items in this set, I also got this same error and had to go through and take them out. I don't understand why this is happening or what on earth it means, and how to fix it so I can use these objects. I don't think it's that they were badly made or anything. Anyways if anyone knows about this or could help me out, that would be so appreciated. Thanks!

Edit: I've discovered something odd- all the files, except one that I'm not sure what it is, are windows. o_0

(Moon_Ez Out Of The Dark Ages - 2 Storie Church Style.package
lethes-mesh-cathedralwindow2story.package
lethes-mesh-rosettewindow.package
lethes-mesh-lothlorienwindowstraight.package
lethes-mesh-lothmansardestraight.package) <the files that cause this error

Someone might have better advice, but I would suggest downloading again. If .zip or .rar it could have corrupted, but still extracted as if it was fine. I've gotten a few from here that were bad on first attempt or totally. It happens.

Hmm, ok I'll try that. I'm not sure it'll work, because them all being windows suggests to me that there might be something else wrong, but I appreciate the advice. Hope I can get them to work!

Could you post the entire error message?

I am trying to clone the guitar. When I try to import the obj file back in, no changes to it, just import the same file back in I get the message, I hope you can help!! Thanks so much. here it is:

Message:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index SimPE Version:
Default (0.58.2.20950).

Exception Stack:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.Collections.ArrayList.get_Item(Int32 index)
at SimPe.Plugin.Gmdc.GmdcImporterBase.BuildGroup(ImportedGroup g)
at SimPe.Plugin.Gmdc.GmdcImporterBase.ProcessLists(ImportedGroups grps)
at SimPe.Plugin.Gmdc.GmdcImporterBase.LoadGroups()
at SimPe.Plugin.Gmdc.AbstractGmdcImporter.Process(Stream input, GeometryDataContainer gmdc, Boolean animationonly)
at SimPe.Plugin.fGeometryDataContainer.StartImport(OpenFileDialog ofd, GeometryDataContainer gmdc, String defext, ElementSorting sorting, Boolean animationonly)
at SimPe.Plugin.fGeometryDataContainer.button1_Click(Object sender, EventArgs e)

Source:
mscorlib

Execution Stack:
at System.Collections.ArrayList.get_Item(Int32 index)
at SimPe.Plugin.Gmdc.GmdcImporterBase.BuildGroup(ImportedGroup g)
at SimPe.Plugin.Gmdc.GmdcImporterBase.ProcessLists(ImportedGroups grps)
at SimPe.Plugin.Gmdc.GmdcImporterBase.LoadGroups()
at SimPe.Plugin.Gmdc.AbstractGmdcImporter.Process(Stream input, GeometryDataContainer gmdc, Boolean animationonly)
at SimPe.Plugin.fGeometryDataContainer.StartImport(OpenFileDialog ofd, GeometryDataContainer gmdc, String defext, ElementSorting sorting, Boolean animationonly)
at SimPe.Plugin.fGeometryDataContainer.button1_Click(Object sender, EventArgs e)