XLogo Errors - Check Interpolation Bitmap

[Xleon]

I'm trying to work with XLogo to see what it's capaable of, but it refuses to work on the little documentation I can find. The error I see did not appear on a forum search, so I'm hoping someone else has seen this.

I'm using the Doom9 guide (underneath the section about using Dekafka).

I've tried with both RGB24 and RGB32 bitmaps, but both give me the following error.....

AVIsynth Open Failure
XLogo: Check Interpolation Bitmap (from 162,39) going right.

My simple script is this....
LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\xlogo.dll")
mpeg2source("H:\ZXC.d2v")
FieldDeinterlace()
Xlogo("H:\MicroMask2.bmp", 200, 200, 128)

I've checked that there is a nice clean border of 0,0,0 pixel colour around the edge of the mask bitmap and I've checked the pixels at 162,39. Is there anything else I'm missing? Does it need an alpha channel? The mask is white pixels on a black background, which worked well in Dekafka.

Any help, very much appreciated.

[Xleon]

OK, so I fixed this by trial and error . .

It requires an Indexed 8-bit BMP. The background colour needs to be flat 0,0,0 with the mask as 255,255,255 on top.

It has a maximum size around 200,200 which causes it to exception.

The plugin now has more options than the Doom9 guide gives guidance for, but these are in the readme at least!

The BMP filename also has to have a zero on the end, eg. 'mask0.bmp'.

The only thing I can't work out noww is that when I put the mask in, the results on the final output are not using it correctly. They seem to have resized it and I can see three copies of my mask in the final frame. How do I fix this?