Reference to deleted material remains and causes error in envi context node

[Lars O. Grobe]

Dear Ryan and vi-suite enthusiasts,

when running envi on this minimalistic shoebox model, I am getting an
error message referring to a material (wallMat) that I had initially
applied to some geometry but later replaced by other materials.
Somewhere int he Blender scene, a reference is apparently sticking
around and making it into the context node. Note that I have vi-suite
installed with Blender 4.3, not 4.2 - is this the culprit? Livi runs
without problems on the same scene.

Best, Lars.

Modelfile (compressed): https://drive.switch.ch/index.php/s/KuD5dyLNzvqEWam

[VI-Suite]

Hi Lars.

4.3 seems to be OK in this regard as I can replicate on 4.2. I haven't done any testing on 4.3 though so there may be other issues.

If you toggle a setting like 'Proxy' within the material node, adWallMat is the culprit, it should clear the reference to the old material. 

A potential code fix is detailed below that I'll include in the next master commit.

In the vi_node.py file at around the line 7609 the first 2 lines of the ep_write function are currently:

    if self.get('bm') and self['bm'] != self.envi_con_base:

        self.envi_con_base = self['bm']

        

Change this to:

    if self.get('bm') and self['bm'] != self.envi_con_base:
        try:
            self.envi_con_base = self['bm']
        except:
            self['bm'] = str(self.envi_con_base)

Just be aware spacings and tabs matter in Python.

Cheers

Ryan

[Lars O. Grobe]

Dear Ryan,

thank you for solving this, I can confirm that the suggested change works on 4.3.

Best, Lars.

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