merge meshes in model by script and xsi dos not render anymore

[Kai Wolter <xsi(at)kaipirinha.com>]

Hello,
I have a strange problem (tested in XSI 6.02 and 6.5):
In a model I have a couple of enveloped meshes (materials are also 
applied) that I'd like to merge to a new mesh (inputs are deleted).
So I have written a command in JScript to import that model (not 
referenced), do the merge on some specific meshes and export the model 
again.
I have basically copied and pasted the log output to build the merge 
code and just added some variables - so really a straight forward merge 
incl. copying the shapes and UVs.
However, after executing the scripted command, when I open a 
render-region, it remains blank (no progress bar in the bottom right).
Same happens when I try to render a complete frame. I have to restart 
XSI to be able to render again.

Since I want to bake the render tree of the merged mesh to a color map 
(in the same script), I have a problem, because I the renderer does not 
work anymore.

I highly appreciate any hints.
On Friday I can setup a sample scene to show this issue.

Thanks in advance,
Kai















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