This is an instance of the usual issue of RMINC not preserving attributes, and results in, e.g., mincWriteVolume not working as expected due to class-based dispatch. For a workaround, try something like class(es) <- class(vs) (where es is the output of mincEffectSizes and vs is the output of the preceding mincLm).
This is an instance of the usual issue of RMINC not preserving attributes, and results in, e.g.,
mincWriteVolumenot working as expected due to class-based dispatch. For a workaround, try something likeclass(es) <- class(vs)(whereesis the output ofmincEffectSizesandvsis the output of the precedingmincLm).