library(umx)
umx_set_data_variance_check() # print current state
old = umx_set_data_variance_check(silent = TRUE) # store existing value
umx_set_data_variance_check(minVar = .01)
umx_set_data_variance_check(maxVarRatio = 500)
umx_set_data_variance_check(minVar = old$minVar, maxVarRatio = old$maxVarRatio) # reinstate
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