[Panpiper]

I've created a ritual 'holy' spell that is reasonably thematic for the chaos mod I am working on. It creates a 'crossbreed' 'mutant' unit. It works as designed, as a ritual spell creating as many crossbreeds as the holy level of the caster. However if I use the <shift> <M> feature to set it as a monthly casting, I get a CTD as soon as I process the turn, with the warning message:

kv: bad mt0

The spell copy is as follows:

#newspell
#name "Chaos Blessed"
#descr "The blessings of Chaos are a mixed bag. Some find themselves truly blessed with useful or even great ability. Others are twisted into a cruel joke by the caprice of chaos."
#restricted 75
#school 7
#researchlevel 0
#path 0 8
#pathlevel 0 1
#fatiguecost 0
#effect 10035
#nreff 1000
#end