A question about variance decomposition

hello! I use "moments_varendo" to get the variance decomposition,
but I get a strange value for example the sum of the posterior variance decomposition of output
not equal one, and for consumption the sum is much smaller than one. It means I get wrong in model?
Thanks for help!
Best Regards YOYO
but I get a strange value for example the sum of the posterior variance decomposition of output
not equal one, and for consumption the sum is much smaller than one. It means I get wrong in model?
Thanks for help!
Best Regards YOYO