Thank you so much to the person who posted a reply (for some reason, I cannot find the reply after reading the email and wish I could give credit where it's due!). For everyone: here's the general code to remove an output file from the set:
name_of_mplus_list_object[["name_of_output_file.out"]] <- NULL
Why do this? I have found that trying to extract and format results from the large
Mplus object list created from readModels() can be tricky if there are 'duds'
in your simulations (i.e., models that did not converge and are therefore missing
aspects of the output).
Many thanks again!
Best,
Liz