Error when run a mediation analysis

Michael_Jasper

When I do a mediation analysis, using Bootstrap (Percentile) with two predictors, one mediator, one dependent, I get the following Error message.

Does this error reside in JASP, or the underlying lavaan?

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This analysis terminated unexpectedly. 

Error in validObject(.Object): invalid class 'Fit' object: invalid object for slot 'fx.group' in class 'Fit': got class 'NULL', should be or extend class 'numeric'

Stack trace

lavaan:::bootstrap.internal(object = fit, R = samples, FUN = coef_with_callback)

lapply(seq_len(RR), fn)

FUN(X[[i]], ...)

lavaan(slotOptions = lavoptions, slotParTable = lavpartable, slotModel = model.boot, slotSampleStats = bootSampleStats, slotData = lavdata)

lav_model_fit(lavpartable = lavpartable, lavmodel = lavmodel, x = x, VCOV = VCOV, TEST = TEST)

new('Fit', npar = max(lavpartable$free), x = x.copy, partrace = PARTRACE, start = lavpartable$start, est = est, se = se, fx = fx, fx.group = fx.group, logl = logl, logl.group = logl.group, iterations = iterations, converged = converged, control = control, Sigma.hat = if (lavmodel@conditional.x) implied$res.cov else implied$cov, Mu.hat = if (lavmodel@conditional.x) implied$res.int else implied$mean, TH = if (lavmodel@conditional.x) implied$res.th else implied$th, test = test)

initialize(value, ...)

initialize(value, ...)

validObject(.Object)

stop(msg, ': ', errors, domain = NA)

To receive assistance with this problem, please report the message above at: https://jasp-stats.org/bug-reports

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Ihnwhi

Hello @Michael_Jasper,

I would say this error has something to do with lavaan. In the lavaan community, I could find one post that has the same error message (see https://groups.google.com/g/lavaan/c/IUU553_L0qE). So, I suggest posting your syntax there and ask for help. You might also get modeling tips.

Hope this helps.

Cheers,

Ihnwhi