Avisynth: Unrecognized exception Line 15
 

OK, what did I mess up this time...
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LoadPlugin("C:\Program Files\MovieStacker\Filters\Mpeg2Dec.dll")
LoadPlugin("C:\Program Files\MovieStacker\Filters\TemporalCleanerOld.dll" )
LoadPlugin("C:\Program Files\MovieStacker\Filters\Convolution3D.dll")
LoadPlugin("C:\Program Files\MovieStacker\Filters\FluxSmooth.dll")
LoadPlugin("C:\Program Files\MovieStacker\Filters\GripFit_preview.dll")
LoadPlugin("C:\Program Files\MovieStacker\Filters\BlockBuster.dll")
LoadPlugin("C:\Program Files\MovieStacker\Filters\DustV5.dll")
LoadPlugin("C:\Program Files\MovieStacker\Filters\LegalClip.dll")
LoadPlugin("C:\Program Files\MovieStacker\Filters\Sampler.dll")

AviSource("C:\Source\Major League.cd2.avi",false)
ConverttoYUY2
LegalClip()
GripCrop(528, 480, overscan=2, source_anamorphic=false)
GripSize(resizer="LanczosResize")
mergechroma(blur(1.58))
mergeluma(blur(0.05))
SpaceDust()
FluxSmooth(temporal_threshold=7, spatial_threshold=7)
TemporalCleaner(ythresh=5, cthresh=10)
#Convolution3D(preset="movieHQ")
BlockBuster(method="noise", detail_min=1, detail_max=7, variance=0.3, seed=1)
BlockBuster(method="sharpen", detail_min=1, detail_max=10, strength=7)
GripBorders()
LegalClip()

#Sampler(length=24)
## MPEG size = ((Total frames/MovieTimeInMinutes)/24) * MPEG sample file size * .98 ##

perhaps you have to write

ConverttoYUY2()